---
dataset_info:
  features:
  - name: image
    dtype: image
  - name: question
    dtype: string
  - name: ground_truth
    dtype: string
  - name: is_text_only
    dtype: bool
  - name: year
    dtype: int32
  - name: class
    dtype: string
  - name: task_id
    dtype: string
  - name: math_category
    dtype: string
  - name: difficulty
    dtype: string
  splits:
  - name: train
    num_bytes: 158221288
    num_examples: 3557
  download_size: 152844456
  dataset_size: 158221288
configs:
- config_name: default
  data_files:
  - split: train
    path: data/train-*
task_categories:
- visual-question-answering
language:
- de
tags:
- Känguruh-Wettberwerb
- math
- vlm
- school
---

# Känguruh Wettbewerb Dataset

This dataset is a German benchmark from the official _Känguru der Mathematik_ competition materials covering 1998--2025 [(Link)](https://www.mathe-kaenguru.de).
Each instance is a single multiple-choice problem with five options (A - E) from school grade levels 3 - 13. The benchmark targets curriculum-aligned mathematical reasoning in German with explicit visual grounding (diagrams, geometric figures, spatial arrangements) while enabling controlled analyzes by year, grade group, difficulty, math subdomain, and modality.

### Processing

Collected PDFs are converted into benchmark-instances via the following four-step pipeline:

* 1. Task localization and cropping
* 2. Manual screening
* 3. Solution alignment
* 4. Structured fields and derived labels


### Schema and Labels

Each instance contains:
* _image_: PNG crop
* _answer_: ground-truth option
* _year_: task year
* _grade_level_: targetet school year of task
* _task_id_: task id
* _difficulty_: diffulty classes A, B, C
* _math_category_: one of arithmetic, geometry, algebra, probability, unknown
* _is_text_only_: bool


## Dataset Overview

| Statistic                      | Value               |
| ---                            | ---                 |
| Years                          | 1998 - 2025         |
| Grade levels                   | 3 - 13 (grouped)    |
| Source PDFs / pages            | 140 / 560           |
| Answer format                  | 5-way MC (A - E)    |
| Total tasks N                  | 3,557               |
| Text-only / visually necessary | 61% / 39%           |
| Difficulty (A/B/C)             | 32.9 / 33.3 / 33.8% |


## Cite as

```
@inproceedings{hug2026kangaroobench,
  author    = {Hug, Dennis and Wolf, Ren\'e and Thomas, Philippe},
  title     = {KangarooBench: A Native German Benchmark for Evaluating the Modality Gap in Visual Mathematics},
  booktitle = {Conference and Labs of the Evaluation Forum (CLEF 2026)},
  year      = {2026},
  note      = {To appear}
}
```