schema.md

Schema

The authoritative dataset file is full.parquet. It contains 3,887 rows and 21 columns.

Column	Type	Description
id	string	Stable item identifier.
year	string	Competition year.
group	string	Grade bucket: 3-4, 5-6, 7-8, 9-10, or 11-13.
language	string	Item language; currently de.
points	int32	Official item value: 3, 4, or 5.
problem_number	string	Problem number within the exam.
problem_statement	string	OCR-corrected problem statement text.
answer	string	Gold multiple-choice answer label: A, B, C, D, or E.
multimodal	bool	Whether the item contains a question image or image-based answer option.
sol_A	string/null	Text for answer option A when available.
sol_B	string/null	Text for answer option B when available.
sol_C	string/null	Text for answer option C when available.
sol_D	string/null	Text for answer option D when available.
sol_E	string/null	Text for answer option E when available.
question_image	bytes/null	PNG bytes for the question crop or visual stem.
sol_A_image_bin	bytes/null	PNG bytes for graphical answer option A.
sol_B_image_bin	bytes/null	PNG bytes for graphical answer option B.
sol_C_image_bin	bytes/null	PNG bytes for graphical answer option C.
sol_D_image_bin	bytes/null	PNG bytes for graphical answer option D.
sol_E_image_bin	bytes/null	PNG bytes for graphical answer option E.
associated_images_bin	list	Additional associated PNG image payloads where applicable.

Image fields are stored directly as binary payloads. Text answer fields may be null when the corresponding answer option is graphical.