question stringlengths 10 716 | options listlengths 4 4 | answer stringclasses 4
values | correct_option stringlengths 1 63 | explanation stringlengths 0 2.6k | dataset stringclasses 3
values |
|---|---|---|---|---|---|
Find out the wrong term in the series 2, 3, 4, 4, 6, 8, 9, 12, 16 | [
"9",
"8",
"7",
"6"
] | A | 9 | Explanation:
The given sequence is a combination of three series:
i)1st, 4th, 7th terms i.e, 2, 4, 9
ii)2nd, 5th, 8th terms i.e, 3, 6, 12
iii)3rd, 6th, 9th terms i.e, 4, 8, 16
In each one of i, ii, iii, each term is twice the preceding term.
So, 9 is wrong and must be replaced by (4*2) = 8
Answer: A) 9 | aqua_rat |
(935421 x 625) = ? | [
"584638125",
"584638130",
"584638135",
"584638140"
] | A | 584638125 | 935421 x 625 = 935421 x 54 = 935421 x 10 4
2
= 935421 x 104 = 9354210000
24 16
= 584638125
A) | aqua_rat |
Of the 6 distinguishable wires that lead into an apartment, 2 are for cable television service, and 3 are for telephone service. Using these wires, how many distinct combinations of 3 wires are there such that at least 1 of the wires is for cable television? | [
"6",
"7",
"8",
"9"
] | C | 8 | Given:
Total number of wires = 6
Number of cable wires = 2
Number of telephone wires = 3
To find:
Number of combination which has at least one cable wires
Solution:
No of ways of selecting'at least'1 cable wire means, we can select more than one as well. The minimum we can select is one and the maximum we can select, g... | aqua_rat |
In an examination a pupil's average marks were 63 per paper. If he had obtained 20 more marks for his Geography paper and 2 more marks for his History paper, his average per paper would have been 65. How many papers were there in the examination? | [
"10",
"11",
"8",
"9"
] | B | 11 | Let the number of papers be x. Then,
63x + 20 + 2 = 65x
= 2x = 22
= x = 11.
ANSWER B | aqua_rat |
One pump drains one-half of a pond in 4 hours, and then a second pump starts draining the pond. The two pumps working together finish emptying the pond in one-half hour. How long would it take the second pump to drain the pond if it had to do the job alone? | [
"1 hour",
"1.1 hour",
"3 hours",
"5 hours"
] | B | 1.1 hour | First pump drains 1/2 of the tank in 4 hours
so 8 hours it will take to drain the full tank.
Let, 2nd pump drains the full tank in a hours
so both together can drain (1/8+1/a) part in 1 hour
son in 1/2 hour they drain 1/2*(1/8+1/a) part of the tank
given that in 1/2 hour they drain 1/2 of the tank
hence we can say
1/2*... | aqua_rat |
What is the rate percent when the simple interest on Rs.800 amount to Rs.160 in 4 Years? | [
"5%",
"7%",
"9%",
"2%"
] | A | 5% | 160 = (180*4*R)/100
R = 5%
Answer: A | aqua_rat |
On dividing a certain number by 5, 7 and 8 successively, the remainders obtained are 2, 3 and 4 respectively. When the order of division is reversed and the number is successively divided by 8, 7 and 5, the respective remainders T will be:[/b] | [
"3, 3, 2",
"3, 4, 2",
"5, 4, 3",
"T=5, 5, 2"
] | D | T=5, 5, 2 | Let the original number be X. Then by the successive dividing we have followings :
X=5A+2
A=7B+3
B=8C+4.
So we have A=7*(8C+4)+3=7*8C+31, and X=5*(7*8C + 31)+2 = 5*7*8C + 157.
Now by dividing X by 8, 7, 5 successively we have followings :
X=8*(5*7C+19)+5
5*7C+19=7*(5C+2) + 5
5C+2=5C+2.
The remainders are, therefore, 5,... | aqua_rat |
Two trains A and B are 100 m and 150 m long and are moving at one another at 54 Km/hr and 36 Km/hr respectively. Arun is sitting on coach B1 of train A. Calculate the time taken by Arun to completely cross Train B. | [
"10 s",
"6 s",
"4 s",
"8 s"
] | B | 6 s | DETAILED SOLUTION
Speed of A = 54∗1000/60∗60 = 15 m/s
Speed of B = 36∗1000/60∗60 = 10 m/s
Relative speed = S1 + S2 = 15 + 10 m/s = 25 m/s
The length that needs to be crossed = length of train B = 150 m. Therefore time taken = 150/25 = 6s.
What is the time taken for trains to completely cross each other? The length that... | aqua_rat |
If books bought at prices ranging from Rs. 110 to Rs. 240 are sold at prices ranging from Rs. 150 to Rs 280, what is the greatest possible profit that might be made in selling 10 books ? | [
"Rs. 1700",
"Rs. 3000",
"Rs. 3500",
"Rs. 3200"
] | A | Rs. 1700 | The greatest profit is possible only if the cost price of the books are minimum and selling prices are maximum.
Let lowest cost price of the 10 books = 110*10 = Rs. 1,100
Maximum selling price of 10 books = 280 *10 = Rs. 2,800
So, maximum profit = 2800 - 1100 = Rs. 1,700
ANSWER : OPTION A | aqua_rat |
A can do a piece of work in 4 days. B can do it in 5 days. With the assistance of C they completed the work in 2 days. Find in how many days can C alone do it? | [
"10 days",
"20 days",
"5 days",
"4 days"
] | B | 20 days | Explanation:
C = 1/2 - 1/4 - 1/5 = 1/20 => 20 days
Answer: Option B | aqua_rat |
Overpopulation may result | [
"from the deaths of many organisms",
"from a boom in reproduction of an organism",
"from natural predators hunting organisms",
"from organisms self regulating their population"
] | B | from a boom in reproduction of an organism | science | |
2,3,4,5,7,11 which number is wrong in series | [
"3",
"4",
"2",
"5"
] | B | 4 | 4...........
all are prime numbers expect 4
ANSWER:B | aqua_rat |
A man walks at a speed of 3 km/hr and runs at a speed of 7 km/hr. How much time will the man require to cover a distance of 10 1/2 km, if he completes half of the distance, i.e., (5 1/4) km on foot and the other half by running? | [
"3 1/2 hours",
"5 1/2 hours",
"2 1/2 hours",
"7 1/2 hours"
] | C | 2 1/2 hours | C
Required time = (5 1/4)/3 + (5 1/4)/7 = 2 1/2 hours | aqua_rat |
There are 3 numbers A, B and C. If A:B = 3/4, B:C = 4/5, C:D = 5/6, then A:D will be? | [
"1 : 2",
"3 : 5",
"5 : 7",
"6 : 11"
] | A | 1 : 2 | Sol. A : B = 3 : 4, B : C = 4 : 5, C : D = 5 : 6
∴A∶B∶C∶D= 3 : 4 : 5 : 6.
Thus, A : D = 3 : 6 or, 1 : 2
A | aqua_rat |
2/5 of 3/7 of 23/11 of ? = 64 × 3 | [
"511",
"419",
"616",
"636"
] | C | 616 | Explanation:
2/5 &time; 3/7 &time; 20/11 &time; x = 192
X = 192 &time; 11 &time; 7 &time; 5/2 &time; 3 &time; 20 = 616
Answer: Option C | aqua_rat |
The area of a square is equal to five times the area of a rectangle of dimensions 20 cm * 16 cm. What is the perimeter of the square? | [
"289 cm",
"160 cm",
"829 cm",
"288 cm"
] | B | 160 cm | Area of the square = s * s
= 5(20* 16)
=> s = 40
= 40 cm
Perimeter of the square
= 4 * 40
= 160 cm.
Answer: B | aqua_rat |
Find the odd man out
864, 420, 200, 93, 40, 16, 6 | [
"420",
"200",
"16",
"93"
] | D | 93 | 6x2+4=16
16x2+8=40
40x2+12=92
92x2+16=200.. and so on. 93
ANSWER:D | aqua_rat |
If a train, travelling at a speed of 90 kmph, crosses a pole in 5 sec, then the length of train is? | [
"128 m",
"125 m",
"198 m",
"276 m"
] | B | 125 m | D = 90 * 5/18 * 5
=125 m
Answer: B | aqua_rat |
What is produced when a colorless solution of lead nitrate is added to a colorless solution of potassium iodide? | [
"purple solid precipitate",
"brown solid precipitate",
"yellow solid precipitate",
"blue solid precipitate"
] | C | yellow solid precipitate | When a colorless solution of lead(II) nitrate is added to a colorless solution of potassium iodide, a yellow solid called a precipitate is instantly produced ( Figure below ). A precipitate is a solid product that forms from a reaction and settles out of a liquid mixture. The formation of a precipitate may also indicat... | science |
Sony and Johnny caught 80 fishes. Sony caught four times as many as Johnny. How many fishes did Johnny catch? | [
"12",
"16",
"34",
"38"
] | B | 16 | s+j=80
s=4*j
j=16
ANSWER:B | aqua_rat |
The smallest number which when diminished by 7, is divisible 12, 16, 18, 21 and 28 is: | [
"1008",
"1015",
"1022",
"1032"
] | B | 1015 | Required number = (L.C.M. of 12,16, 18, 21, 28) + 7
= 1008 + 7
= 1015
Answer: Option B | aqua_rat |
A motorcyclist goes from Bombay to Nagpur, a distance of 600 kms at an average of 120 kmph speed. Another man starts from Bombay by car 1 ½ hours after the first, and reaches Nagpur ½ hour earlier. What is the ratio of the speed of the motorcycle and the car? | [
"1:2",
"1:7",
"1:9",
"3:5"
] | D | 3:5 | T = 600/120 = 5 h
T = 5 - 2 = 3
Time Ratio = 5:3
Speed Ratio = 3:5
Answer: D | aqua_rat |
In 2008, a certain factory produced 20% more widgets than it did in 2007, and its production in 2009 was 120% of its production in 2008. By approximately what percent would its production need to decrease the following year for the factory to produce the same number of widgets it did in 2007? | [
"31%",
"35%",
"40%",
"44%"
] | A | 31% | Let P be the original level of production in 2007.
Let x be the rate of production in 2010 compared to 2009.
x*1.2*1.2*P = P
x = 1/1.44 = 0.6944 which is a decrease of about 31%.
The answer is A. | aqua_rat |
The 52nd term of the series a, b , b, c, c, c, d, d, d, d, e, e, e, e, e, .... is | [
"f",
"k",
"l",
"j"
] | D | j | a is one time, b,2 times so on...
so 52=n(n+1)/2..
0r n(n+1)= 104... now 10*11=110...9*10<104 so n= 10.. and 10th alphabet is J. ans D | aqua_rat |
Two pipes A and B can fill a tank in 20 and 30 minutes respectively. If both the pipes are used together, then how long will it take to fill the tank? | [
"12 min",
"15 min",
"20 min",
"25 min"
] | A | 12 min | art filled by A in 1 min. = 1/20
Part filled by B in 1 min. = 1/30
part filled by (A + B) in 1 min. = 1/20 + 1/30 = 1/12.
Both the pipes can fill the tank in 12 minutes.
ANSWER A | aqua_rat |
A department store perceived a run on a lower priced garment and raised the price by 20% to keep stock available until another shipment arrived. Customers fumed and the department store manager allowed them to purchase the garments at 80% of the new price to save face. What was the difference in the new retail price an... | [
"4.0%",
"5.0%",
"6.0%",
"7.0%"
] | A | 4.0% | Quantity X Rate = Price
1 X 1 = 1
0.8 X 1.20 = 0.960
Decrease in price = (0.040/1) × 100 = 4.0%
Answer = Option A | aqua_rat |
The value of x + x(xx) when x = 2 is | [
"6",
"2",
"8",
"10"
] | D | 10 | x + x(xx)
Put the value of x = 2 in the above expression we get,
2 + 2(22)
= 2 + 2(2 × 2)
= 2 + 2(4)
= 2 + 8
= 10.
Answer is D. | aqua_rat |
Some birds are pollinators that co-evolved with what other type of organism? | [
"animals",
"humans",
"vegetation",
"producers"
] | D | producers | Some birds are pollinators that co-evolved with producers. | qasc |
What two forces tend to keep an animal stationary and thus oppose locomotion? | [
"thickness and gravity",
"workload and gravity",
"friction and gravity",
"stength and gravity"
] | C | friction and gravity | science | |
We bought 85 hats at the store. Blue hats cost $6 and green hats cost $7. The total price was $548. How many green hats did we buy? | [
"36",
"38",
"40",
"42"
] | B | 38 | Let B be the number of blue hats and let G be the number of green hats.
B+G=85.
B=85-G.
6B+7G=548.
6(85-G)+7G=548.
510-6G+7G=548.
G=548-510=38.
The answer is B. | aqua_rat |
Pale skin and reduced eyes in salamanders that live in dark caves are an example of what? | [
"reproduction",
"expansion",
"adaptations",
"interpretation"
] | C | adaptations | Salamanders are found in most moist or arid habitats in the Northern Hemisphere, but can also be found south of the equator. They live on all continents except Antarctica and Australia. Salamanders live in or near water or on moist ground, often in a swamp. Some species live in water most of their life, some live their... | science |
From January 1, 2015, to January 1, 2017, the number of people enrolled in health maintenance organizations increased by 11 percent. The enrollment on January 1, 2017, was 45 million. How many million people, to the nearest million, were enrolled in health maintenance organizations on January 1, 2015 ? | [
"38",
"39",
"40",
"41"
] | D | 41 | Soln:-
11x=45 --> 10/9*x=45 --> x=45*9/10=1500/37=~41.
Answer: D. | aqua_rat |
Amino acids are made by which kind of plastid? | [
"sporozoans",
"neuroplasts",
"glucoplasts",
"leucoplasts"
] | D | leucoplasts | Leucoplasts are plastids that store substances such as starch or make small molecules such as amino acids. | science |
A train travelled from station P to Q in 8 hours and came back from station Q to P is 6 hours. What would be the ratio of the speed of the train while traveling from station P to Q to that from station Q to P? | [
"3 : 6",
"3 : 9",
"3 : 3",
"3 : 4"
] | D | 3 : 4 | Since S # 1/t
S1 : S2 = 1/t1 : 1/t2 = 1/8 : 1/6 = 3 : 4
Answer:D | aqua_rat |
A 470 m long train is running at a speed of 55 Km/hr. It crossed a platform of length 520 m in ? | [
"41.1 sec",
"64.8 sec",
"31.8 sec",
"50.4 sec"
] | B | 64.8 sec | Speed = 55 Km/hr
(to convert km/hr in to M/s)
= 55 x 5/18 M/s
Distance = 470 m + 520 m ( If questions is about train crossing a post you need to consider only the length of Train, )
= 990 m
Time = Distance / Speed
= 990 x 18 / (5 x 55)
= 64.8 sec
Ans is :B | aqua_rat |
Jacob is now 12 years younger than Michael. If 11 years from now Michael will be twice as old as Jacob, how old will Jacob be in 4 years? | [
"3",
"7",
"15",
"5"
] | D | 5 | Jacob=x years, Mike=x+12 years
11 years from now,
2(x+11)=x+23
2x+22=x+23
x=1
x+4=5 years
Answer D | aqua_rat |
In a group of 100 people,60 like volleyball,50 like hockey. How many like both volleyball and hockey? | [
"20",
"15",
"10",
"5"
] | C | 10 | Make a Venn diagram, and enter your data.
Let the number of people who like both volleyball and hockey be x
60-x+x+50-x = 100
x = 10
so number who like both volleyball and hockey = 10
Answer C | aqua_rat |
What do rotating vanes on an electric fan do to air? | [
"dampen",
"circulate",
"cool",
"warm"
] | B | circulate | science | |
The elements in group 2 are called what? | [
"noble gases",
"alkaline earth metals",
"metal alloys",
"halogens"
] | B | alkaline earth metals | The elements in Group 2 (beryllium, magnesium, calcium, strontium, barium, and radium) are called the alkaline earth metals (see Figure below ). These elements have two valence electrons, both of which reside in the outermost s sublevel. The general electron configuration of all alkaline earth metals is n s 2 . The alk... | science |
A person will make ethanol out of all aside from | [
"salt",
"grain",
"corn",
"maize"
] | A | salt | science | |
The ratio of the number of red cars in a certain parking lot to the number of black cars is 3 to 8. If there are 90 black cars in the lot, how many red cars are there in the lot? | [
"11",
"33",
"24",
"31"
] | B | 33 | R/B = 3/8 and B =90
R = 90*3/8 = 33 | aqua_rat |
What are the two types of fats? | [
"thick and thin",
"full and empty",
"saturated and unsaturated",
"liquid and solid"
] | C | saturated and unsaturated | Fats may be either saturated or unsaturated. A saturated fat is a fat that consists of triglycerides whose carbon chains consist entirely of carbon-carbon single bonds. Therefore, the carbon chains are saturated with the maximum number of hydrogen atoms possible. An unsaturated fat is a fat that consists of triglycerid... | science |
A and B can do a piece of work in 10 days, while B and C can do the same work in 15 days and C and A in 25 days. they started working together, after 4 days A left. After another 4 days B left. In how many days C can finish the remaining work? | [
"16",
"32",
"64",
"96"
] | D | 96 | Let the rates of A, B and C be a, b, and c respectively.
A and B can do a piece of work in 10 days: a + b = 1/10;
B and C can do the same work in 15 days: b + c = 1/15;
C and A can do the same work in 25 days: c + a = 1/25.
Sum the above 3 equations: 2(a + b + c) = 31/150 --> a + b + c = 31/300
Subtract a + b = 1/10 fr... | aqua_rat |
If 20% of a number = 400, then 120% of that number will be? | [
"20",
"120",
"360",
"2400"
] | D | 2400 | Let the number x. Then,
20% of x = 400
x = (400 * 100)/20 = 2000
120% of x = (120/100 * 2000) = 2400.
ANSWER:D | aqua_rat |
The C.P of 15 books is equal to the S.P of 20 books. Find his gain% or loss%? | [
"28%",
"25%",
"24%",
"23%"
] | B | 25% | explanation:
15 CP = 20 SP
20 --- 5 CP loss
100 --- ? => 25% loss
Answer: B | aqua_rat |
A boat ma goes 2km against the current of the stream in 1 hr and goes 1 km along the current in 10 min. how long will it take to go 6 km in stationary water | [
"40 min",
"1hr",
"1hr 15 min",
"1hr 30 min"
] | D | 1hr 30 min | rate down stream=(1/10*60)km/hr=6km/hr
rate up stream=2km/hr
speed still water =1/2(6+2)=4km/hr
required time =(6/4)=1 1/4=1hr 30 min
Answer(D) | aqua_rat |
The average of five numbers is 27. If one number is excluded, the average becomes 25. The excluded number is | [
"33",
"35",
"28",
"220"
] | B | 35 | Explanation:
Excluded number = (27 x 5) - (25 x 4) = 135 - 100 = 35.
Answer: B | aqua_rat |
A box contains 100 balls, numbered from 1 to 100. If three balls are selected at random and with replacement from the box, what is the probability J that the sum of the three numbers on the balls selected from the box will be odd? | [
"1/4",
"3/8",
"1/2",
"5/8"
] | C | 1/2 | The sum of the three numbers on the balls selected from the box to be odd one should select either three odd numbered balls (Odd+Odd+Odd=Odd) or two even numbered balls and one odd numbered ball (Even+Even+Odd=Odd);
P(OOO)=(1/2)^3;
P(EEO)=3*(1/2)^2*1/2=3/8 (you should multiply by 3 as the scenario of two even numbered ... | aqua_rat |
Find out the wrong term in the series 1, 2, 2, 4, 8, 12 | [
"12",
"24",
"32",
"16"
] | C | 32 | Explanation:
Each number with in the series is the product of the two numbers that proceed it.
So, if (2 * 2 = 4) , then (4 * 8= 32 ). 32 should replace 12.
Answer: C) 32 | aqua_rat |
Sam and Nik start from A and B respectively at the same time and travel towards each other at constant speeds along the same route. After meeting at a point between A and B, Sam and Nik proceed to their destinations of B and A respectively. Sam reaches B 60 minutes after the two meet and Nik reaches A 90 minutes after ... | [
"60 minutes",
"120 minutes",
"200 minutes",
"225 minutes"
] | B | 120 minutes | t-time taken for AB to meet
(Vs+Vn)t=Vs*60+Vn*90;
Vs(t-60)=Vn(90-t)
This means 60<t<90
so ans will be 60+t
Only B fits this eqn | aqua_rat |
What is the single bone that forms the posterior skull and posterior base of the cranial cavity? | [
"maxilla",
"limbic bone",
"radiating bone",
"occipital bone"
] | D | occipital bone | Occipital Bone The occipital bone is the single bone that forms the posterior skull and posterior base of the cranial cavity (Figure 7.9; see also Figure 7.8). On its outside surface, at the posterior midline, is a small protrusion called the external occipital protuberance, which serves as an attachment site for a lig... | science |
A man can row downstream at 20 kmph and upstream at 10 kmph. Find the speed of the man in still water and the speed of stream respectively? | [
"15,2",
"15, 4",
"15, 8",
"15, 5"
] | D | 15, 5 | Let the speed of the man in still water and speed of stream be x kmph and y kmph respectively.
Given x + y = 20 --- (1)
and x - y = 10 --- (2)
From (1) & (2) 2x = 30 => x = 15, y = 5.
Answer:D | aqua_rat |
Two men A and B start from place X walking at 4 ½ kmph and 5 ¾ kmph respectively. How many km apart they are at the end of 3 ½ hours if they are walking in the same direction? | [
"5 km",
"10 4/3 km",
"4 3/8 km",
"18 km"
] | C | 4 3/8 km | Explanation:
RS = 5 ¾ - 4 ½ = 1 ¼
T = 3 ½ h.
D = 5/4 * 7/2 = 35/8 = 4 3/8 km
C) | aqua_rat |
which one of these would ensure the least amount of risk to make contact with? | [
"an electric wire wrapped in water",
"an electric wire wrapped in metal",
"an electric wire wrapped in steel",
"an electric wire wrapped in thick cotton"
] | D | an electric wire wrapped in thick cotton | science | |
The speed of a boat in upstream is 60 kmph and the speed of the boat downstream is 90 kmph. Find the speed of the boat in still water and the speed of the stream? | [
"10 kmph.",
"15 kmph.",
"18 kmph.",
"11 kmph."
] | B | 15 kmph. | Speed of the boat in still water = (60+90)/2 = 75 kmph. Speed of the stream = (90-60)/2
= 15 kmph.
Answer:B | aqua_rat |
If xy ≠ 0 and x^2y^2 − 2xy = 8, which of the following could be y in terms of x?
I. 4/x
II. -x/2
III. 3/x | [
"I only",
"II only",
"I and II",
"I and III"
] | A | I only | (x^2)(y^2) – 2xy - 8 = 0
(xy – 4)(xy + 2) = 0
xy – 4 = 0 or xy + 2 = 0
xy = 4 or xy = -2
Since we need y in terms of x, we can isolate y in both of our equations.
y = 4/x or y = -2/x
Answer: A | aqua_rat |
What is a compound in which all of the atoms are connected to one another by covalent bonds? | [
"covalent bond element",
"covalent mixture",
"covalent network solid",
"compound metal"
] | C | covalent network solid | One type of molecular compound behaves quite differently than that described so far. A covalent network solid is a compound in which all of the atoms are connected to one another by covalent bonds. Diamond is composed entirely of carbon atoms, each bonded to four other carbon atoms in a tetrahedral geometry. Melting a ... | science |
If n is an integer, f(n) = f(n-1) - n and f(4)=14. What is the value of f(6)? | [
"3",
"0",
"1",
"2"
] | A | 3 | Since f(n)=f(n-1)-n then: f(6)=f(5)-6 and f(5)=f(4)-5.
As given that f(4)=14 then f(5)=14-5=9 --> substitute the value of f(5) back into the first equation: f(6)=f(5)-6=9-6=3.
Answer: A.
Questions on funtions to practice: | aqua_rat |
What do cells make up of organisms? | [
"structure only",
"function only",
"structure and function",
"members of their own species"
] | C | structure and function | Cells are the basic units of the structure and function of organisms. | qasc |
If the speed of X meters per minute is equivalent to the speed of Y kilometers per hour, what is Y in terms of X? (1 kilometer=1000 meters) | [
"15x/18",
"6x/5",
"18x/5",
"6/100x"
] | D | 6/100x | If the speed of X meters per minute is equivalent to the speed of Y kilometers per hour, what is Y in terms of X? (1 kilometer=1000 meters)
We need to find an equation with x in the answer...
convert all measurements so they are alike (i.e. convert km to m, minutes to hours, etc)
Speed = x/t
x meters/second
(60) x mete... | aqua_rat |
A certain clock marks every hour by striking a number of times equal to the hour, and the time require for a stroke is exactly equal to the time interval between strokes. At 6:00 the time lapse between the beginning of the first stoke and the end of the last stroke is 22 seconds. At 8:00, how many seconds elapse betwee... | [
"26",
"30",
"36",
"38"
] | B | 30 | at 6'o clock, there would be 6 strikes. First strike, then a short interval, the second strike, then a short interval and so on till the 6th strike. So there would be in all 5 intervals between 6 strikes. Similarly, between 8 strikes, there would be 7 intervals.
According to the question, the time spent in the strike a... | aqua_rat |
Which of the following ratios is greatest? | [
"7 : 15",
"15 : 23",
"17 : 25",
"21 : 29"
] | D | 21 : 29 | Sol.
7/15 = 0.466,
15/23 = 0.652,
17/25 = 0.68<,br/> 21/29 = 0.724,
Clearly, 0.724 is greatest and therefore, 21 : 29 is greatest.
Answer D | aqua_rat |
Which of the following is closest in value to (9^13)-(9^2)? | [
"9^9",
"9^8",
"9^13",
"9^6"
] | C | 9^13 | 9^13 is much larger number than 9^2 and as we need approximate value then it's pretty much negligible in this case, so: (9^13)-(9^2) = ~9^9.
Answer: C.
Similar questions to practice:
Hope it helps. | aqua_rat |
The volumes of two cones are in the ratio 1 : 10 and the radii of the cones are in the ratio of 1 : 2. What is the length of the wire? | [
"2:5",
"2:9",
"2:2",
"2:2"
] | A | 2:5 | The volume of the cone = (1/3)πr2h
Only radius (r) and height (h) are varying.
Hence, (1/3)π may be ignored.
V1/V2 = r12h1/r22h2 => 1/10 = (1)2h1/(2)2h2
=> h1/h2 = 2/5
i.e. h1 : h2 = 2:5
Answer: A | aqua_rat |
If 15 and 20 are the lengths of two sides of a triangular region, which of the following can be the length of the third side?
I. 10
II. 20
III. 40 | [
"I only",
"II only",
"I and II only",
"II and III only"
] | C | I and II only | The length of any side of a triangle must be larger than the positive difference of the other two sides, but smaller than the sum of the other two sides.
Let x be the length of the third side.
20-15 < x < 20+15
5 < x < 35
The answer is C. | aqua_rat |
Any place at which two bones are joined is called a what? | [
"expression",
"modification",
"articulation",
"constriction"
] | C | articulation | An articulation is any place at which two bones are joined. The humerus is the largest and longest bone of the upper limb and the only bone of the arm. It articulates with the scapula at the shoulder and with the forearm at the elbow. The forearm extends from the elbow to the wrist and consists of two bones: the ulna a... | science |
At what rate of compound interest per annum will a sum of Rs. 1200 become Rs. 1348.32 in 2 years | [
"3%",
"4%",
"5%",
"6%"
] | D | 6% | Explanation:
Let Rate will be R%
1200(1+R/100)2=134832 /100
(1+R/100)2=134832/120000
(1+R/100)2=11236/10000
(1+R/100)=106/100
=>R=6%
Option D | aqua_rat |
The average weight of 20 persons sitting in a boat had some value. A new person added to them whose weight was 47 kg only. Due to his arrival, the average weight of all the persons decreased by 5 kg. Find the average weight of first 20 persons? | [
"55",
"56",
"57",
"58"
] | D | 58 | 20x + 47 = 21(x – 5)
X=58
ANSWER:D | aqua_rat |
From theinteger n, if n*n*n is odd, then what is true from below options? | [
"n is odd and n*n is even",
"n is odd",
"n*n is even",
"n is even"
] | A | n is odd and n*n is even | n is odd and n*n is even
Option A | aqua_rat |
A man is three (3) years older than his wife and four (4) times as old as his son. If the son attains an age of fifteen (15) years after three (3) years, what is the present age of the mother? | [
"60 years",
"51 years",
"48 years",
"45 years"
] | D | 45 years | Let mother age be x
Father age be x+3
X+3=4×12
X=45
ANSWER:D | aqua_rat |
If c = 9/25, m = 15/32, and m + w + c = 1, which of the following gives the values of m, w, and c in increasing order? | [
"c, m, w",
"c, w, m",
"m, w, c",
"w, c, m"
] | D | w, c, m | Answer D - w, c, m
c ~ 1/3
m ~ 1/2
and m+w+c = 1 hence w ~ 1/6
Hence increasing order would be w -> c -> m
Answer D | aqua_rat |
What refers to the development and nourishment of an embryo within the mother’s body but not inside an egg? | [
"adolescence",
"vivipary",
"birth",
"ovulation"
] | B | vivipary | Vivipary refers to the development and nourishment of an embryo within the mother’s body but not inside an egg. Birth may be followed by a period of parental care of the offspring. This reproductive strategy occurs in almost all mammals including humans. | science |
The average salary of all the workers in a workshop is Rs. 8000. The average salary of 7 technicians is Rs. 11000 and the average salary of the rest is Rs. 6000. The total number of workers in the workshop is | [
"14",
"21",
"22",
"23"
] | A | 14 | Sol.
Let the total number of workers be x. Then,
8000x = (10000 × 7) + 6000 ( x – 7)
‹=› 2000x = 28000
‹=› x = 14.
Answer A | aqua_rat |
Express of the following as a fraction: 4% | [
"2/25",
"1/25",
"4/25",
"7/25"
] | B | 1/25 | 4% =4/100 =1/25.
Answer is B. | aqua_rat |
What is the major selective advantage of myelination? | [
"space efficiency",
"potentiation",
"heat regulation",
"storage capacity"
] | A | space efficiency | science | |
Dawson got a weekly raise of $160. If he gets paid every other week, write an integer describing how the raise will affect his paycheck. | [
"150",
"160",
"170",
"180"
] | B | 160 | Let the 1st paycheck be x (integer).
Dawson got a weekly raise of $ 160.
So after completing the 1st week she will get $ (x+160).
Similarly after completing the 2nd week she will get $ (x + 160) + $ 160.
= $ (x + 160 + 160)
= $ (x + 320)
So in this way end of every week her salary will increase by (B)$ 160. | aqua_rat |
Last year, Company X paid out a total of $1,050,000 in salaries to its 21 employees. If no employee earned a salary that is more than 8% greater than any other employee, what is the lowest possible salary that any one employee earned? | [
"$40,000",
"$41,667",
"$42,000",
"$46,460.17"
] | D | $46,460.17 | Employee 1 earned $x(say)
Employee 2 will not earn more than $1.08x
Therfore, to minimize the salary of any one employee, we need to maximize the salaries of the other 20 employees
(1.08x*20)+x=1,050,000
Solving for x=$46,460.17
Answer D | aqua_rat |
The difference between a number and its two-fifth is 510. What is 20% of that number? | [
"58",
"170",
"95",
"100"
] | B | 170 | Let the number be x. Then,
x - 2/5 x = 510
x = (510 * 5)/3 = 850
20% of 850 = 170.
Answer:B | aqua_rat |
Marge has W candies, where W is an integer such that 20 < W< 50. If Marge divides the candies equally among 5 children, she will have 2 candies remaining. If she divides the candies among 6 children, she will have 1 candy remaining. How many candies will remain if she divides the candies among 7 children? | [
"0",
"1",
"2",
"3"
] | C | 2 | If Marge divides the candies equally among 5 children, she will have 2 candies remaining.
This tells us that the candies are of 5x + 2 type and so 22, 27, 32, 37, 42, or 47
If she divides the candies among 6 children, she will have 1 candy remaining.
this tells us it is if 6x+1 type and so 25, 31, 37, 43, or 49
ONLY 37... | aqua_rat |
A manufacturer produces a certain men's athletic shoe in integer sizes from 8 to 17. For this particular shoe, each unit increase in size corresponds to a 1/5-inch increase in the length of the shoe. If the largest size of this shoe is 40% longer than the smallest size, how long, in inches, is the shoe in size 15? | [
"5.4",
"5.9",
"6.3",
"6.7"
] | B | 5.9 | Let x be the length of the size 8 shoe.
Then 0.4x = 9/5
x = 4.5 inches
The size 15 shoe has a length of 4.5 + 7/5 = 5.9 inches
The answer is B. | aqua_rat |
Of 10 applicants for a job, 3 had at least 5 years of prior work experience, 4 had advanced degrees, and 2 had at least 5 years of prior work experience and advanced degrees. How many of the applicants had neither 5 years of prior work experience nor advanced degrees? | [
"3",
"9",
"5",
"4"
] | C | 5 | Had advanced degrees and 5 years work experience: 2
Only had 5 years work experience: 3-2 = 1
Only had advanced degrees: 4-2 = 2
10-2-1-2=5
Answer: C | aqua_rat |
In eukaryotes, mrna may be modified before leaving what? | [
"mitochondria",
"epidermis",
"ribosome",
"nucleus"
] | D | nucleus | During transcription, a copy of mRNA is made that is complementary to a strand of DNA. In eukaryotes, mRNA may be modified before it leaves the nucleus. | science |
The sum of all consecutive odd integers from −27 to 37, inclusive, is | [
"110",
"135",
"150",
"165"
] | D | 165 | The sum of the odd numbers from -27 to +27 is 0.
Let's add the remaining numbers.
29+31+33+35+37 = 5(33) = 165
The answer is D. | aqua_rat |
Three pipes, A, B, & C are attached to a tank. A & B can fill it in 20 & 30 minutes respectively while C can empty it in 20 minutes. If A, B & C are kept open successively for 1 minute each, how soon will the tank be filled? | [
"2 hours",
"4 hours",
"1 hour 30 min",
"5 hours"
] | C | 1 hour 30 min | in three minute 1/20+1/30-1/20=2/60 = 1/30 part is filled
3 min--------1/30 parts
x min--------- 1 part(full)
x=90 min =1 hour 30 min
ANSWER:C | aqua_rat |
The difference between the simple and the compound interest compounded every six months at the rate of 10% p.a. at the end of two years is 124.05. What is the sum? | [
"10,000",
"6,000",
"12,000",
"8,000"
] | D | 8,000 | Let the sum be x.
Then, [x(1+5/100)4−x]−[x×10×2/100]=124.05
Solving the above eqns, we get x = 8,000.
Answer D | aqua_rat |
[1/4(2/5) + 1/2(4/9)] = ? | [
"7/11",
"5/11",
"2/11",
"1/11"
] | A | 7/11 | Explanation:
[1/4(2/5) + 1/2(4/9)] = 1/(22/5) + 1/(22/9)
= 5/22 + 9/22 = 14/22 = 7/11
Answer: Option A | aqua_rat |
What has a characteristic life cycle that includes alternation of generations? | [
"burrs",
"tulips",
"Oak",
"Trees"
] | B | tulips | tulips have a characteristic life cycle that includes alternation of generations. | qasc |
If 12 men and 16 boys can do a piece of work in 5 days; 13 men and 24 boys can do it in 4 days, then the ratio of the daily work done by a man to that of a boy is? | [
"2:1",
"2:7",
"2:2",
"2:6"
] | A | 2:1 | Let 1 man's 1 day work = x and 1 boy's 1 day work = y.
Then, 12x + 16y = 1/5 and 13x + 24y = 1/4
Solving these two equations, we get:
x = 1/100 and y = 1/200
Required ratio = x:y = 1/100 : 1/200 = 2:1.
Answer:A | aqua_rat |
The simple interest and the true discount on a certain sum for a given time and at a given rate are Rs. 88 and Rs. 80 respectively. The sum is: | [
"880",
"1450",
"1600",
"1800"
] | A | 880 | Sol.
Sum = S.I. * T.D. / (S.I)-(T.D.) = 88 * 80 / (88 - 80) = Rs.880.
Answer A | aqua_rat |
A group of four girls and three boys have tickets for seven adjacent seats in one row of a theater. If the three boys will not sit in three adjacent seats, how many possible different seating arrangements are there for these 7 theatre-goers? | [
"7! – 2!3!2!",
"7! – 4!3!",
"7 × 2!3!2!",
"7! – 5!3!"
] | D | 7! – 5!3! | There are 3 boys and 4 girls , we want to calculate the seating arrangements if three boys do not sit together, like MMM.
Let's calculate the # of arrangements when they SIT together and subtract from total # of arrangements of these 7 persons without restriction. Thus we'll get the # of arrangements asked in the quest... | aqua_rat |
Jim is twice as old as Stephanie, who, four years ago, was three times as old as Kate. If, five years from now, the sum E of their ages will be 51, how old is Stephanie ? | [
"6",
"10",
"14",
"20"
] | B | 10 | 1) take C (14y.o.), so mean that S=14, J=28, their sum itself is 42+10 years from now is 52, it is over the 51,
so eliminate C,D,E
2) take B (10y.o.),E= meaning S=10,J=20, so 20+10+10=40 and for K=10-4/3=2+9=11, finally 40+11=51. It is correct
B | aqua_rat |
There are, in a certain league, 20 teams, and each team face another team for a total of 4 times. How many games are played in the season? | [
"450",
"760",
"110",
"180"
] | B | 760 | By using the formula, t[n(n - 1) / 2], where t = no. of games between two teams and n = total no. of teams, we get: 760
Option B. | aqua_rat |
What was the last supercontinent on earth? | [
"pangaea",
"rodinia",
"eurasia",
"laurasia"
] | A | pangaea | There are times in Earth history when all of the continents come together to form a supercontinent . Supercontinents come together and then break apart. Pangaea was the last supercontinent on Earth, but it was not the first. The supercontinent before Pangaea is called Rodinia. Rodinia contained about 75% of the contine... | science |
A, B and C enter into a partnership. A initially invests Rs. 25 lakhs and adds another Rs. 10 lakhs after one year. B initially invests Rs. 35 lakhs and withdraws Rs. 10 lakhs after 2 years and C invests Rs. 30 lakhs. In what ratio should the profits be divided at the end of 3 years ? | [
"11:10:15",
"20:17:23",
"19:19:18",
"5:4:9"
] | C | 19:19:18 | Explanation:
A:B:CA:B:C =(25 lakhs××1)+(35 lakhs××2) :(35 lakhs××2+25 lakhs××1) :(30 lakhs××3)
= 95 lakhs : 95 lakhs : 90 lakhs =19:19:18=19:19:18.
ANSWER IS C | aqua_rat |
A sum of Rs.63000 is divided into three parts such that the simple interests accrued on them for three, six and nine years respectively may be equal. Find the amount deposited for 3 years. | [
"6000",
"2000",
"6500",
"4500"
] | A | 6000 | Let the amounts be x, y, z in ascending order of value. As the interest rate and interest accrued are same for 3 years 6 years and 9 years i.e. 3x = 6y = 9z = k.
L.C.M. of 3,6,9 = 18 So x:y:z: = 6000 : 3000 :2000
The amount deposited for 3 years = 6000
ANSWER:A | aqua_rat |
If in a race of 100m, A covers the distance in 20 seconds and B in 25 seconds, then A beats B by: | [
"20m",
"16m",
"11m",
"10m"
] | A | 20m | Explanation:
The difference in the timing of A and B is 5 seconds. Hence, A beats B by 5 seconds.
The distance covered by B in 5 seconds = (100 * 5) / 25 = 20m
Hence, A beats B by 20m.
ANSWER A | aqua_rat |
The ratio of boarders to day students at a school was originally 2 to 5. However, after a number of new boarders join the initial 60 boarders, the ratio changed to 1 to 2. If no boarders became day students and vice versa, and no students left the school, how many new boarders joined the school? | [
"12",
"15",
"20",
"24"
] | B | 15 | Let x be the number of new boarders.
The ratio changed from 2:5 = 4:10 up to 1:2 = 5:10.
60 / (60+x) = 4/5
x = 15
The answer is B. | aqua_rat |
The third proportional to 1 and 2 is? | [
"2",
"1",
"4",
"8"
] | C | 4 | (2*2)/1 = 4
Answer: C | aqua_rat |
What can be removed to preserve food? | [
"water",
"nutrients",
"toxins",
"salt"
] | A | water | Removing water preserves food. | qasc |
A car started running at a speed of 30 km/hr and the speed of the car was increased by 2 km/hr at the end of every hour. Find the total distance covered by the car in the first 10 hours of the journey. | [
"227",
"390",
"287",
"2771"
] | B | 390 | The total distance covered by the car in the first 10 hours = 30 + 32 + 34 + 36 + 38 + 40 + 42 + 44 + 46 + 48 = sum of 10 terms in AP whose first term is 30 and last term is 48 = 10/2 [30 + 48] = 390 km.
Answer: B | aqua_rat |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.