- Cryptograms (暗号文)
- Dissection (裁ち合わせ)
- Folding (ペーパーフォールディングパズル)
- Games (ゲーム)
- Illusions (錯覚)
- Magic figures ()
- Mathematical art ()
- Mathematical humor ()
- Mathematical records ()
- Mathematics in the arts ()
- Number guessing ()
- Numerology ()
- Puzzles ()
- Sports ()
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