Mathematical Logic
Mathematical logic is about reasoning, not memorised formulas. You need to spot a pattern, test an assumption and rule out wrong options. This skill helps directly with olympiad-style problems.
More than 400 tasks
From simple series to multi-step puzzles
Explanations for every answer
The line of reasoning is shown, not just the answer
Unlimited access
Come back to the hard task types anytime
For students and adults
Suitable from age 12
Question types
- Logic puzzles. Non-standard conditions with no ready template.
- Conditions. Working through "if… then…" to find the only valid conclusion.
- Deduction. Drawing a precise conclusion without adding assumptions.
- Truth and lies. Problems where some statements are knowingly false.
- Mazes and paths. Finding a route under rules and constraints.
Difficulty levels
- Easy — more than 100 tasks. Simple patterns and conclusions.
- Medium — more than 200 tasks. Conditions, deduction, truth-and-lies tasks.
- Hard — more than 60 tasks. Multi-step problems and unusual conditions.
Available languages
- 7 languages: English, Русский, Español, 中文, Deutsch, Қазақша, Français
Who it is for
- Students interested in olympiad problems and non-standard conditions.
- Anyone preparing for logic and aptitude tests.
- Adults training their thinking — everything is explained with examples.
Buy test access
Amounts in other currencies are shown for reference at the Bank of Russia rate of 16.10.2026. Payment is made in rubles.
To Pay:
₽300≈ 3.58 $≈ 1613.97 ₸≈ 24.00 ¥≈ 3.20 €
