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ARC-Easy
arc_04_01161
Which change increases the rate of a chemical reaction?
[ "increasing the reaction temperature", "using larger particles of solid reactants", "reducing the concentration of the reactants", "adding an inhibitor to the reaction mixture" ]
A
null
medmcqa
medmcqa_05_01362
Increased intra-cranial tension is related to:
[ "Hyotension and tachycardia", "Hypertension and tachycardia", "Hypertension and bradycardia", "Hypotension and bradycardia" ]
C
Ans. (c) Hypertension and BradycardiaRef: Harrison 18th edition, chapter 25* Cushing's reflex = a hypothalamic response to brain ischemia wherein the sympathetic nervous system is activated which causes increased peripheral vascular resistance with a subsequent increase in BP.* The increased BP then activates the paras...
openbookqa
obqa_02_00274
while passing Jupiter the
[ "better the view", "stronger the gravity", "moon orbits you", "gravitational force weakens" ]
B
as distance from an object decreases , the the pull of gravity on that object increases
openbookqa
obqa_02_01909
As air begins to chill, it may push out
[ "sand", "liquids", "fire", "carrots" ]
B
dew is formed when water vapor condenses over night
math_qa
mathqa_03_01195
a good train 800 metres long is running at a speed of 78 km / hr . if it crosses a tunnel in 1 minute , then the length of the tunnel ( in meters ) is :
[ "600", "300", "400", "500" ]
D
speed = 78 * 5 / 18 m / sec = = > 65 / 3 length of the tunnel be x then 800 + x / 60 = 65 / 3 3 ( 800 + x ) = 3900 x = 500 answer d
sciq
sciq_01_08040
What is an alloy of copper and tin?
[ "gold", "zinc", "bronze", "silver" ]
C
Bronze, an alloy of copper and tin, has been in use since ancient times. The Bronze Age saw the increased use of metals rather than stone for weapons, tools, and decorative objects. Brass, an alloy of copper and zinc, is widely used in musical instruments like the trumpet and trombone.
sciq
sciq_01_10840
Ginkgo trees are gymnosperms with broad?
[ "fruits", "trunks", "roots", "leaves" ]
D
Ginkgo trees are gymnosperms with broad leaves.
math_qa
mathqa_03_04770
at what rate percent on simple interest will rs . 750 amount to rs . 950 in 5 years ?
[ "3.33 %", "5.93 %", "4.33 %", "5.33 %" ]
D
"200 = ( 750 * 5 * r ) / 100 r = 5.33 % answer : d"
openbookqa
obqa_02_02023
If an electric circuit has six paths and another electric circuit has one path, the six path circuit is
[ "really broken", "singular", "equidistant", "slowly burning" ]
C
if electricity flows along more than one pathway then the circuit is parallel
sciq
sciq_01_06088
Physical science is defined as the study of what?
[ "biology & light", "matter & elements", "light & matter", "matter & energy" ]
D
Look at the topographic map of Stowe, Vermont ( Figure below ). There is a steep hill rising just to the right of the city of Stowe. You can tell this because the contour lines there are closely spaced. The contour lines also show that the hill has a sharp rise of about 200 feet. Then the slope becomes less steep towar...
sciq
sciq_01_00262
While climate change in earth history was due to natural processes, what is primarily to blame for recent global warming?
[ "wars", "human actions", "factories", "volcanos" ]
B
Climate change in Earth history was due to natural processes. Recent global warming is due mainly to human actions. The burning of fossil fuels releases greenhouse gases into the air. This creates greater greenhouse effect and global warming.
sciq
sciq_01_05024
The simplest organic compounds have hydrogen and what else?
[ "nitrogen", "sodium", "oxygen", "carbon" ]
D
The simplest organic compounds are those composed of only two elements: carbon and hydrogen. These compounds are called hydrocarbons. Hydrocarbons themselves are separated into two types: aliphatic hydrocarbons and aromatic hydrocarbons. Aliphatic hydrocarbons are hydrocarbons based on chains of C atoms. There are thre...
math_qa
mathqa_03_03677
a shopkeeper sells 20 % of his stock at 10 % profit ans sells the remaining at a loss of 5 % . he incurred an overall loss of rs . 350 . find the total worth of the stock ?
[ "20029", "20000", "20289", "17500" ]
D
"let the total worth of the stock be rs . x . the sp of 20 % of the stock = 1 / 5 * x * 1.1 = 11 x / 50 the sp of 80 % of the stock = 4 / 5 * x * 0.95 = 19 x / 25 = 38 x / 50 total sp = 11 x / 50 + 38 x / 50 = 49 x / 50 overall loss = x - 49 x / 50 = x / 50 x / 50 = 350 = > x = 17500 answer : d"
math_qa
mathqa_03_03529
what is the total number of prime numbers less than 70 ?
[ "17", "18", "19", "20" ]
C
solution prime numbers less than 70 are = 12 . 2,3 , 5,7 , 11,13 , 17,19 , 23,29 , 31,37 , 41,43 , 47,53 , 59,61 , and 67 their number is 19 . answer c
sciq
sciq_01_09328
Why do electronegativities decrease from top to bottom?
[ "larger atomic variation", "smaller atomic size", "larger atomic size", "larger electric pull" ]
C
Electronegativities generally increase from left to right across a period. This is due to an increase in nuclear charge because of the greater number of protons in the nucleus. Alkali metals have the lowest electronegativities, while halogens have the highest. Because most noble gases do not form compounds, they are ge...
medmcqa
medmcqa_05_01253
Scabies in adults differs from that in children by –
[ "Not involving face", "Non involving genitals", "Not involves areola", "Involves whole body" ]
A
Scalp, face, palm and soles are characteristically spared in adult, whereas these areas are involved in infants and young children.
math_qa
mathqa_03_04217
in a certain kindergarten , half of the children are allergic to peanuts , 10 children are not allergic to cashew nuts , 10 children are allergic to both peanuts and cashew nuts , and 18 children are allergic to cashew nuts . how many of the kindergarten ' s children are not allergic to peanuts and are not allergic to ...
[ "14", "10", "8", "6" ]
D
we are given children allergic to cashew nuts as 18 and not allergic to cashew nuts as 10 , so total = 10 + 18 = 28 . . . children allergic to both are 10 . . . 18 are allergic to cashew nuts , so and half or 28 / 2 = 14 are allergic to peanuts . . so children allergic to at least one of the two are 18 + 14 - 10 = 22 ....
medmcqa
medmcqa_05_04575
Methotrexate toxicity is prevented by giving?
[ "Folic acid", "Folinic add", "Citric acid", "Glucaric acid" ]
B
Ans. is 'b' i.e., Folinic acid * Folinic acidFor preventing methotrexate toxicity* AllopurinolTo prevent hyperuricemia caused by rapid destruction of cells during cancer chemotherapy.* Lithium carbonateIt has stimulant effect on bone marrow, so used during myelosuppresive drug therapy.* OndensetronFor controlling cytot...
sciq
sciq_01_09943
What do power plants burn to generate electricity?
[ "biofuel", "timber", "fossil fuels", "nuclear fuel" ]
C
Power plants and factories account for more than a quarter of fossil fuel use. Power plants burn fossil fuels to generate electricity. Factories burn fossil fuels to power machines.
sciq
sciq_01_09535
Plaque is surgically removed from the walls of a vessel in which surgery?
[ "arthroscopy", "lumpectomy", "discectomy", "endarterectomy" ]
D
whereas atherosclerosis is a more specific term for the build-up of plaque in the walls of the vessel and is a specific type of arteriosclerosis. There is also a distinct genetic component, and pre-existing hypertension and/or diabetes also greatly increase the risk. However, obesity, poor nutrition, lack of physical a...
medmcqa
medmcqa_05_00725
What is meant by "Suppositions child":
[ "Child born out of wedlock", "Child fictitiously claimed by a woman", "Second born of a twin pregnancy", "Child is born after aificial insemination homologous" ]
B
B i.e. Child fictitiously claimed by a woman Suppositious (fictitious) child is a child fictidiously claimed by a women as her ownQ
openbookqa
obqa_02_03034
Which would be excluded from a list of objects with metallurgical properties?
[ "iron", "bone", "gold", "steel" ]
B
classifying means grouping materials by their properties
openbookqa
obqa_02_01345
A field is tilled and soil is filled with nutrients after years of
[ "bears eroding trees", "the flu dissolving", "stones being destroyed", "corn burning up" ]
C
soil is formed by rocks eroding
sciq
sciq_01_08398
What are the blood vessels that carry blood toward the heart and tend to have thinner walls?
[ "capillaries", "glands", "veins", "clots" ]
C
Veins are blood vessels that carry blood toward the heart. This blood is no longer under pressure, so veins have thinner walls. To keep the blood moving, many veins have valves that prevent the backflow of blood. Veins generally carry oxygen-poor blood. The smallest veins are called venules. They merge to form larger a...
sciq
sciq_01_01394
The logistics of carrying out cellular metabolism sets limits on what physical property of the cell?
[ "composition", "surface", "size", "layer" ]
C
openbookqa
obqa_02_02777
Ecosystems
[ "are made up of many plants and lack living animals", "are communities with a plethora of living beings", "only contain animals of the same species", "are present only on certain continents" ]
B
an ecosystem contains large numbers of living organisms in a particular place
sciq
sciq_01_10355
The three layers of protective coverings of the spinal cord is called what?
[ "dermis", "muscles", "meninges", "tendons" ]
C
35.3 | The Central Nervous System By the end of this section, you will be able to: • Identify the spinal cord, cerebral lobes, and other brain areas on a diagram of the brain • Describe the basic functions of the spinal cord, cerebral lobes, and other brain areas The central nervous system (CNS) is made up of the brain...
math_qa
mathqa_03_01313
if x / y = 3 and ( 2 a - x ) / ( 5 b - y ) = 3 , then the value of a / b is ?
[ "15 / 2", "- 2", "1", "2" ]
A
"x = 3 y 2 a - 3 y = 3 ( 5 b - y ) 2 a - 3 y = 15 b - 3 y 2 a = 15 b a / b = 15 / 2 answer : a"
openbookqa
obqa_02_00950
A dog that has a very thick tail, that mates with another dog with a thick tail, has a strong likelihood of creating a litter of
[ "calico kittens", "tailless pups", "small tailed pups", "dense tailed pups" ]
D
the thickness of the parts of an organism is an inherited characteristic
sciq
sciq_01_00814
What are considered solid lipids that animals use to store energy?
[ "fats", "acids", "sugars", "proteins" ]
A
Fats are solid lipids that animals use to store energy. Examples of fats include butter and the fat in meat.
math_qa
mathqa_03_01234
find the least number must be subtracted from 427398 so that remaining no . is divisible by 15 ?
[ "2", "3", "5", "7" ]
B
"on dividing 427398 by 15 we get the remainder 3 , so 3 should be subtracted b"
math_qa
mathqa_03_04365
if a light flashes every 6 seconds , how many times will it flash in 1 / 2 of an hour ?
[ "301 times", "351 times", "401 times", "451 times" ]
A
"in 1 / 2 of an hour there are 30 * 60 = 1800 seconds the number of 6 - second intervals = 1800 / 6 = 300 after the first flash , there will be 300 more flashes for a total of 301 . the answer is a ."
sciq
sciq_01_06307
The larger surface area of leaves allows them to capture more what?
[ "chlorophyll", "molecules", "sunlight", "pollen" ]
C
Roots: Support for the Plant Roots are not well preserved in the fossil record; nevertheless, it seems that they did appear later in evolution than vascular tissue. The development of an extensive network of roots represented a significant new feature of vascular plants. Thin rhizoids attached the bryophytes to the sub...
sciq
sciq_01_02489
What are jellyfish and other cnidarian's stingers called?
[ "nematocysts", "prokaryotes", "necrocytes", "phenocrysts" ]
A
Cnidarians such as jellyfish have radial symmetry. Flatworms and roundworms, which you will read about next, have bilateral symmetry.
medmcqa
medmcqa_05_01847
Preganglionic parasympathetic nerve fiber which supply pelvic viscera is/are -a) Ventral rami of S2S3S4 b) Hypogastric plexusc) Pudendal nerved) Pelvic Splanchnic nervee) Inferior mesenteric plexus
[ "b", "ad", "ac", "ab" ]
B
Ventral rami of S2-4 gives rise to the pelvic splanchnic nerve. They act as preganglionic parasympathetic fibers to pelvic organs.
ARC-Challenge
arc_04_02775
Mr. Jenkins constructed a circuit consisting of a variable source, wires, and a resistor. In order to triple the amount of current, how should he change the voltage of the source?
[ "make the voltage three times larger", "make the voltage one-third as great", "make the voltage nine times larger", "make the voltage one-ninth as great" ]
A
null
openbookqa
obqa_02_02089
Rocks folded over and over which developed
[ "tall areas", "wet rivers", "large trees", "grassy yards" ]
A
the Himalayas were formed by rock folding
sciq
sciq_01_06912
The first few species to colonize a disturbed area are called what?
[ "original species", "pioneer species", "colonization species", "producer species" ]
B
The first few species to colonize a disturbed area are called pioneer species. In primary succession, pioneer species must be organisms that can live on bare rock. They usually include bacteria and lichens (see Figure below ). Along with wind and water, the pioneer species help weather the rock and form soil. Once soil...
medmcqa
medmcqa_05_00935
Which of the following is not an indication for thrombolysis in stroke patient?
[ "Ischemic stroke of less than 3 hours", "CT scan showing no hemorrhage or edema > 1/ 3rd of the MCA territory", "Sustained blood pressure> 185/110 mm Hg despite treatment", "Clinical diagnosis of stroke" ]
C
Sustained blood pressure> 185/110 mm Hg despite treatment is not an indication of thrombolysis in stroke patient. INDICATION Clinical diagnosis of stroke Onset of symptoms to time of drug administration <=4.5 hours CT scan showing no hemorrhage or edema of >1/3 of the MCA territory Age 18 >= years CONTRAINDICATIONS Sus...
medmcqa
medmcqa_05_04282
Pseudomonal infection should not be cleaned by:
[ "Dettol", "Hypochlorite", "Chlorine", "Betadine" ]
A
Pseudomonas species grow comparatively well in Dettol. Cetrimide & dettol have been incorporated in the media for the selective isolation of pseudomonas.
openbookqa
obqa_02_02811
If a thing changes through a chemical process, it will have different and new chemical properties, such as
[ "adding cats to a home", "adding cream to tile", "adding lemon juice to milk", "adding salt to sand" ]
C
if an object undergoes chemical change then that object will have new chemical properties
math_qa
mathqa_03_03202
solve for x and check : - 200 x = 1600
[ "2000", "2573", "1600", "2950" ]
C
"solution : dividing each side by - 200 , we obtain ( - 200 x / - 200 ) = ( 1600 / - 200 ) therefore : x = - 8 check : - 200 x = 1600 ( - 200 * - 8 ) = 1600 1600 = 1600 answer : c"
openbookqa
obqa_02_01708
Lake Ontario formed from
[ "construction workers", "mechanical weathering", "tectonic shifts", "asteroids" ]
B
a glacier causes mechanical weathering
sciq
sciq_01_03076
What type of resource cannot be replaced as easily as it is consumed?
[ "biological", "nonrenewable", "renewable", "untapped" ]
B
A nonrenewable resource is one that cannot be replaced as easily as it is consumed. Fossil fuels are an example of nonrenewable resources. They take millions of years to form naturally, and so they cannot be replaced as fast as they are consumed. To take the place of fossil fuel use, alternative energy resources are be...
sciq
sciq_01_11060
What type of solvents is glucose insoluble in?
[ "nonpolar", "polar", "acidic", "alkaline" ]
A
The same principles govern the solubilities of molecular solids in liquids. For example, elemental sulfur is a solid consisting of cyclic S8 molecules that have no dipole moment. Because the S8 rings in solid sulfur are held to other rings by London dispersion forces, elemental sulfur is insoluble in water. It is, howe...
math_qa
mathqa_03_01553
jim is able to sell a hand - carved statue for $ 750 which was a 35 % profit over his cost . how much did the statue originally cost him ?
[ "$ 496.30", "$ 512.40", "$ 555.56", "$ 574.90" ]
C
"750 = 1.35 * x x = 750 / 1.35 = 555.5555556 . . . which rounds to $ 555.56 , which is ( c ) ."
ARC-Challenge
arc_04_02456
What is the relationship between a community and a population?
[ "A population is smaller than a community.", "A population is larger than a community.", "A population includes communities of organisms interacting.", "A community includes populations of organisms interacting." ]
D
null
sciq
sciq_01_06116
The vast majority of what phenomena occurs along one of three types of plate boundaries?
[ "volcanoes", "hurricane", "tornados", "earthquake" ]
D
Nearly 95% of all earthquakes take place along one of the three types of plate boundaries. As you learned in the Plate Tectonics chapter, scientists use the location of earthquakes to draw plate boundaries.
openbookqa
obqa_02_00087
Filling a bottle full of water and then placing it in the freezer can lead to
[ "loosening of the bottle lid", "deflation of the bottle", "ice cubes in the freezer", "bursting of the bottle" ]
D
when water freezes , that water expands
sciq
sciq_01_00758
What do ocean mollusks use to absorb oxygen from the water?
[ "pores", "gills", "shells", "scales" ]
B
Most ocean mollusks have a gill or gills to absorb oxygen from the water.
math_qa
mathqa_03_04116
if n is a natural number , then ( 7 ( n 2 ) + 7 n ) is always divisible by :
[ "3 and 7", "14 only", "7 only", "7 and 14" ]
D
"solution ( 7 n 2 + 7 n ) = 7 n ( n + 1 ) , which is always divisible by 7 and 14 both , since n ( n + 1 ) is always even . answer d"
sciq
sciq_01_01579
Salt-water biomes in the ocean are called what?
[ "ocean biomes", "marine species", "marine organelles", "marine biomes" ]
D
Aquatic biomes are water-based biomes. They include both freshwater biomes, such as rivers and lakes, and marine biomes, which are salt-water biomes in the ocean. The primary producers in most aquatic biomes are phytoplankton. Phytoplankton consist of microscopic bacteria and tiny algae that make food by photosynthesis...
sciq
sciq_01_11371
An aqueous solution is a homogeneous mixture in which the most abundant component is what?
[ "air", "water", "oxygen", "blood" ]
B
An aqueous solution is a homogeneous mixture in which the most abundant component is water. The other substance(s) are typically introduced in a solid or liquid form and mixed into the water until they are evenly distributed. For example, if we placed a sample of ethanol in water and mixed it homogeneously, we would ha...
sciq
sciq_01_06983
What are different forms of the same gene?
[ "peptides", "alleles", "nuerons", "genomes" ]
B
Homologous chromosomes form a pair, one from each parent. Homologous chromosomes are similar in size and shape, and contain the same genes, though they may have different alleles. Alleles are alternative forms of the same gene. This diagram represents two pairs of homologous chromosomes.
sciq
sciq_01_10889
The human genome has how many more alu elements than the chimpanzee genome?
[ "three times", "ten", "two times", "six times" ]
A
sciq
sciq_01_05860
Many parasites have complex life cycles involving multiple ?
[ "features", "hosts", "diseases", "viruses" ]
B
math_qa
mathqa_03_00382
one pipe can fill a tank three times as fast as another pipe . if together the two pipes can fill the tank in 39 minutes , then the slower pipe alone will be able to fill the tank in
[ "144 mins", "140 mins", "136 mins", "156 minw" ]
D
"explanation : let the slower pipe alone fill the tank in x minutes then faster will fill in x / 3 minutes . part filled by slower pipe in 1 minute = 1 / x part filled by faster pipe in 1 minute = 3 / x part filled by both in 1 minute = 1 / x + 3 / x = 1 / 39 = > 4 / x = 1 / 39 x = 39 ∗ 4 = 156 mins option d"
openbookqa
obqa_02_04424
friction acts to counter the motion of two objects when their surfaces are what?
[ "converging", "separated", "in vision", "apart" ]
A
friction acts to counter the motion of two objects when their surfaces are touching
sciq
sciq_01_07523
There are six fundamentally different kinds of nuclear decay reactions, and each releases a different kind of particle or what?
[ "mass", "mineral", "protein", "energy" ]
D
an identical particle that has been ejected from a heavier nucleus. There are six fundamentally different kinds of nuclear decay reactions, and each releases a different kind of particle or energy. The essential features of each reaction are shown in Figure 20.4 "Common Modes of Nuclear Decay". The most common are alph...
ARC-Easy
arc_04_00155
Which renewable resource is used with photovoltaic cells to produce electricity?
[ "hydrothermal energy", "solar energy", "geothermal energy", "nuclear energy" ]
B
null
ARC-Easy
arc_04_01645
Which of the following best describes the purpose of cellular respiration?
[ "to provide energy for cell activities", "to produce sugar for storage in cells", "to release oxygen for breathing", "to supply carbon dioxide for photosynthesis" ]
A
null
sciq
sciq_01_07676
What do you call a substance that cannot be separated into smaller pieces, which is also defined by the number of protons it has?
[ "molecule", "element", "electrol", "atom" ]
B
element: A substance that cannot be separated into smaller pieces. Defined by how many protons it has.
ARC-Easy
arc_04_01997
A scientist crosses a red-flowered plant with a white-flowered plant, and all offspring have red flowers. What will most likely result if these red-flowered offspring are crossed with white-flowered plants?
[ "All of the offspring will have red flowers.", "All of the offspring will have white flowers.", "The offspring will have either red or white flowers.", "The offspring will have neither red nor white flowers." ]
C
null
ARC-Easy
arc_04_00769
What are the products in the chemical reaction below? NaOH + HCl -> NaCl + H_{2}O
[ "sodium hydroxide and hydrogen chloride", "sodium chloride and water", "sodium, chlorine, hydrogen, and oxygen", "sodium, chlorine, and water" ]
B
null
sciq
sciq_01_11598
What's it called when there's a sudden flow of mud?
[ "avalanche", "mudflow", "sediment", "dirt bath" ]
B
A mudflow is the sudden flow of mud down a slope because of gravity. Mudflows occur where the soil is mostly clay. Like landslides, mudflows usually occur when the soil is wet. Wet clay forms very slippery mud that slides easily. Mudflows follow river channels, washing out bridges, trees, and homes that are in their pa...
openbookqa
obqa_02_02440
A plant that needs to expand will be able to have an endless resource in
[ "dirt", "pesticides", "pay", "beans" ]
A
soil is a renewable resource for growing plants
sciq
sciq_01_11465
What do we call a peptide hormone composed of nine amino acids that lowers blood pressure?
[ "bradykinin", "angiotensin", "bufotenin", "parcnid" ]
A
Bradykinin is a peptide hormone composed of nine amino acids that lowers blood pressure. Its primary structure is arg-pro-pro-gly-phe-ser-pro-phe-arg. Would you expect bradykinin to be positively charged, negatively charged, or neutral at a pH of 6.0? Justify your answer.
sciq
sciq_01_03584
What is the name of the tube that carries sperm from the epididymis to the urethra?
[ "vas deferens", "fallopian tube", "ureter", "prostate gland" ]
A
The vas deferens is a tube that carries sperm from the epididymis to the urethra.
sciq
sciq_01_02258
Magnetic force is always perpendicular to what?
[ "speed", "velocity", "sunlight", "length" ]
B
So does the magnetic force cause circular motion? Magnetic force is always perpendicular to velocity, so that it does no work on the charged particle. The particle’s kinetic energy and speed thus remain constant. The direction of motion is affected, but not the speed. This is typical of uniform circular motion. The sim...
openbookqa
obqa_02_01740
adding salt to a solid decreases what?
[ "how much light it emits", "how much sound it emits", "the energy needed to harden", "the speed it travels" ]
C
adding salt to a solid decreases the freezing point of that solid
openbookqa
obqa_02_03477
If a thing is going to shock you, you could block the shock best with
[ "a log cabin", "a metal plane", "an aluminium cup", "a tin can" ]
A
wood is an electrical energy insulator
medmcqa
medmcqa_05_04760
Indication for fundoplication?
[ "GERD", "Gastric volvulus", "Diaphragmatic eventration", "Bockdelec's hernia" ]
A
Ans. is 'a' i.e., GERD o Fundoplication is indicated in patients of GERD in following conditions-Patients with evidence of severe esophageal injury (ulcer/stricture/barrett's).No response''relapse/incomplete resolution on medical therapy.Patients with long duration of symptoms.Patients with persistant symptoms at a you...
sciq
sciq_01_09014
The term “vapor” refers to the gas phase when it exists at a temperature below what?
[ "liquid temperature", "contaminated temperature", "boiling temperature", "freezing temperature" ]
C
for low temperatures, where the phase can change from a gas to a liquid. The term “vapor” refers to the gas phase when it exists at a temperature below the boiling temperature.
math_qa
mathqa_03_03328
in a certain corporation , there are 300 male employees and 150 female employees . it is known that 10 % of the male employees have advanced degrees and 40 % of the females have advanced degrees . if one of the 450 employees is chosen at random , what is the probability this employee has an advanced degree or is female...
[ "1 / 5", "5 / 15", "6 / 15", "3 / 10" ]
C
p ( female ) = 150 / 450 = 1 / 3 p ( male with advanced degree ) = 0.1 * 300 / 450 = 30 / 450 = 1 / 15 the sum of the probabilities is 6 / 15 = 2 / 5 the answer is c .
math_qa
mathqa_03_00064
in 2008 , the profits of company n were 10 percent of revenues . in 2009 , the revenues of company n fell by 20 percent , but profits were 15 percent of revenues . the profits in 2009 were what percent of the profits in 2008 ?
[ "80 %", "105 %", "120 %", "124.2 %" ]
C
"x = profits r = revenue x / r = 0,1 x = 10 r = 100 2009 : r = 80 x / 80 = 0,15 = 15 / 100 x = 80 * 15 / 100 x = 12 12 / 10 = 1,2 = 120 % , answer c"
sciq
sciq_01_09205
What is the process in which cells make proteins called?
[ "light synthesis", "factor synthesis", "gas synthesis", "protein synthesis" ]
D
The process in which cells make proteins is called protein synthesis . It actually consists of two processes: transcription and translation . Transcription takes place in the nucleus. It uses DNA as a template to make an RNA molecule. RNA then leaves the nucleus and goes to a ribosome in the cytoplasm, where translatio...
sciq
sciq_01_06557
Which organ in the body controls the amount of water loss in urine in response to maintaining homeostasis?
[ "lungs", "liver", "kidneys", "spleen" ]
C
The boy in Figure below is working out on a hot day. He’s losing a lot of water in sweat. To maintain homeostasis, his body can balance the water lost in sweat by excreting less water in urine. The amount of water lost in urine is controlled by the kidneys. The kidneys are organs of excretion.
math_qa
mathqa_03_04283
on a certain transatlantic crossing , 20 percent of a ship ’ s passengers held round - trip tickets and also took their cars abroad the ship . if 20 percent of the passengers with round - trip tickets did not take their cars abroad the ship , what percent of the ship ’ s passengers held round - trip tickets ?
[ "20 %", "25 %", "30 %", "35 %" ]
B
"let t be the total number of passengers . let x be the number of people with round trip tickets . 0.2 t had round trip tickets and took their cars . 0.8 x had round trip tickets and took their cars . 0.8 x = 0.2 t x = 0.25 t the answer is b ."
math_qa
mathqa_03_04065
find the value of ( √ 1.21 ) / ( √ 0.64 ) + ( √ 1.44 ) / ( √ 0.49 ) is
[ "195 / 63", "145 / 63", "155 / 63", "3.089" ]
D
"( √ 1.21 ) / ( √ 0.64 ) + ( √ 1.44 ) / ( √ 0.49 ) 11 / 8 + 12 / 7 = > 3.089 answer is d"
math_qa
mathqa_03_00941
find the product of the localvalue and absolutevalue of 7 in 20768 ?
[ "9200", "1100", "4900", "3200" ]
C
"local value of 7 = 7 x 100 = 700 place value of 7 = 7 there fore = 7 x 700 = 4900 c"
ARC-Challenge
arc_04_02216
Giant redwood trees change energy from one form to another. How is energy changed by the trees?
[ "They change chemical energy into kinetic energy.", "They change solar energy into chemical energy.", "They change wind energy into heat energy.", "They change mechanical energy into solar energy." ]
B
null
openbookqa
obqa_02_03967
What would light bounce off of when it hits it?
[ "a wall painted grey", "old worn out leather", "a freshly waxed car", "a street made of gravel" ]
C
when light hits a reflective object , that light bounces off that object
sciq
sciq_01_03036
What simple machine consists of a bar that rotates around a fixed point called the fulcrum?
[ "rotor", "battering ram", "catapult", "lever" ]
D
A lever is a simple machine that consists of a bar that rotates around a fixed point called the fulcrum. There are three classes of levers. Depending on its class, a lever may have an ideal mechanical advantage that is less than, equal to, or greater than 1. First-class levers also change the direction of the input for...
openbookqa
obqa_02_00116
Corn can sometimes
[ "be grown in arctic environments", "be used as kindling", "fuel a steam locomotive", "fuel an economy car" ]
D
ethanol sometimes is made of corn
sciq
sciq_01_09901
Dna consists of how many long chains of nucleotides?
[ "zero", "three", "one", "two" ]
D
DNA consists of two long chains of nucleotides. Nitrogen bases on the two chains form hydrogen bonds with each other. Adenine always bonds with thymine, and guanine always bonds with cytosine. These bonds hold the two chains together and give DNA is characteristic double helix, or spiral, shape. You can see the shape o...
sciq
sciq_01_02378
Fossil evidence indicates that the ancestors of humans originated on which continent?
[ "south america", "north america", "africa", "australia" ]
C
openbookqa
obqa_02_01362
A person puts liquid matter in a glass and it
[ "is hardened", "evaporates immediately", "is shaped similarly", "melts the glass" ]
C
Matter in the liquid phase has variable shape
sciq
sciq_01_09248
What do cyclotrons use to cause particles to move in circular orbits?
[ "layers field", "mixed field", "magnetic field", "occurs field" ]
C
Figure 33.8 Cyclotrons use a magnetic field to cause particles to move in circular orbits. As the particles pass between the plates of the Ds, the voltage across the gap is oscillated to accelerate them twice in each orbit.
ARC-Challenge
arc_04_02420
All elements found on the left side of the Periodic Table of the Elements have what properties in common?
[ "They are solids at room temperature.", "They don't conduct electricity.", "They are brittle and dull.", "They are radioactive." ]
A
null
ARC-Easy
arc_04_02035
A student was taking notes while the teacher was discussing cells. Which of these is a statement that the teacher most likely made?
[ "Most cells have the same shape.", "The shape of a cell depends upon its function.", "Cells that carry information are round and disk-shaped.", "Blood cells that move through the body are long and thread-like." ]
B
null
sciq
sciq_01_04168
How many types of tissue are found in animals?
[ "four", "Ten", "six", "three" ]
A
Muscle tissue is one of the four types of tissue found in animals. There are three different types of muscle in the body ( Figure below ):.
math_qa
mathqa_03_02126
a women purchased 3 towels @ rs . 100 each , 5 towels @ rs . 150 each and two towels at a certain rate which is now slipped off from his memory . but she remembers that the average price of the towels was rs . 170 . find the unknown rate of two towels ?
[ "a", "b", "c", "d" ]
B
"10 * 170 = 1700 3 * 100 + 5 * 150 = 1050 1700 – 1050 = 650 b"
sciq
sciq_01_05138
Bicarbonate is the second most abundant anion in the blood. its principal function is to maintain your body’s acid-base balance by being part of these?
[ "compound systems", "stream systems", "buffer systems", "curb systems" ]
C
Bicarbonate Bicarbonate is the second most abundant anion in the blood. Its principal function is to maintain your body’s acid-base balance by being part of buffer systems. This role will be discussed in a different section. Bicarbonate ions result from a chemical reaction that starts with carbon dioxide (CO2) and wate...
sciq
sciq_01_04387
The superior nasal concha and middle nasal concha are parts of which bone?
[ "gastrulation bone", "nasal bone", "nostril bone", "ethmoid bone" ]
D
Figure 7.13 Lateral Wall of Nasal Cavity The three nasal conchae are curved bones that project from the lateral walls of the nasal cavity. The superior nasal concha and middle nasal concha are parts of the ethmoid bone. The inferior nasal concha is an independent bone of the skull.
openbookqa
obqa_02_00805
A herd of deer may be forced to search for a new home if
[ "resources in an area become too few to maintain the herd", "water in an area becomes slightly briny", "more babies are born in the spring", "moose move into an area that deer are in" ]
A
if the amount of available food and water decreases in an environment then animals may leave that environment to find food and water
math_qa
mathqa_03_02645
a man rows his boat 75 km downstream and 45 km upstream , taking 2 1 / 2 hours each time . find the speed of the stream ?
[ "6", "7", "5", "8" ]
A
"speed downstream = d / t = 75 / ( 2 1 / 2 ) = 30 kmph speed upstream = d / t = 45 / ( 2 1 / 2 ) = 18 kmph the speed of the stream = ( 30 - 18 ) / 2 = 6 kmph answer : a"
ARC-Easy
arc_04_00681
Randall is picking lettuce from his garden for dinner. His mother told him to leave some leaves on each plant. Why is it important to leave some leaves on the plant?
[ "Leaves help the plant make food.", "Leaves help the plant absorb water.", "Leaves help the plant stand upright.", "Leaves help the plant make seeds." ]
A
null
openbookqa
obqa_02_03714
the winter solstice is on June 21st in the
[ "upper side of earth", "only online in blogs", "on the dark side of the moon", "lower half of terra" ]
D
the winter solstice is on June 21st in the southern hemisphere
math_qa
mathqa_03_03499
a work can be finished in 16 days by 30 women . the same work can be finished in 10 days by sixteen men . the ratio between the capacity of a man and a woman is
[ "3 : 1", "4 : 3", "2 : 3", "2 : 1" ]
A
"work done by 30 women in 1 day = 1 / 16 work done by 1 woman in 1 day = 1 / ( 16 × 30 ) work done by 16 men in 1 day = 1 / 10 work done by 1 man in 1 day = 1 / ( 10 × 16 ) ratio of the capacity of a man and woman = 1 / ( 10 × 16 ) : 1 / ( 16 × 30 ) = 1 / 10 : 1 / 30 = 1 / 1 : 1 / 3 = 3 : 1 option a"
openbookqa
obqa_02_04633
Which would likely transfer special heat via waves?
[ "a cat", "a rocket", "a car", "an atom bomb" ]
D
radiation is when heat is transferred through waves