List questions from recreational-mathematics

Published on 16 Apr 2026 - 7:49

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Knowing the time of arrival to point X

Published on 13 Apr 2026 - 4:25

681

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Determining odds in Blackjack

Published on 17 Apr 2026 - 2:42

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Which is bigger: $9^{9^{9^{9^{9^{9^{9^{9^{9^{9}}}}}}}}}$ or $9!!!!!!!!!$?

Published on 16 Apr 2026 - 19:25

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Rubik's cube interesting questions?

Published on 16 Apr 2026 - 23:27

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Why does rearranging the pieces of this triangle illusion give a different area?

Published on 16 Apr 2026 - 15:24

353

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Is there any mathematical trick?

Published on 13 Apr 2026 - 9:53

461

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Natural set to express any natural number as sum of two in the set

Published on 12 Apr 2026 - 4:13

478

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Behaviour of the series $\exp_p(x)=\sum_{k=0}^{\infty}\frac{x^k}{(k!)^p}$ depending on $p\approx 2$?

Published on 22 Apr 2026 - 21:34

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What are the 2125922464947725402112000 symmetries of a Rubik's Cube?

Published on 15 Apr 2026 - 8:58

762

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Fewest required values in magic square?

Published on 15 Apr 2026 - 0:28

2k

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For which number does multiplying it by 99 add a 1 to each end of its decimal representation?

Published on 16 Apr 2026 - 9:15

1.8k

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How many steps does it take the computer to solve a Sudoku puzzle?

Published on 13 Apr 2026 - 20:37

1.3k

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Decryption Problem

Published on 10 Apr 2026 - 18:54

1.1k

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any pattern here ? (revised 2)

Published on 17 Apr 2026 - 2:31

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Fun math outreach/social activities

Knowing the time of arrival to point X

Determining odds in Blackjack

Which is bigger: $9^{9^{9^{9^{9^{9^{9^{9^{9^{9}}}}}}}}}$ or $9!!!!!!!!!$?

Rubik's cube interesting questions?

Why does rearranging the pieces of this triangle illusion give a different area?

Is there any mathematical trick?

Natural set to express any natural number as sum of two in the set

Behaviour of the series $\exp_p(x)=\sum_{k=0}^{\infty}\frac{x^k}{(k!)^p}$ depending on $p\approx 2$?

What are the 2125922464947725402112000 symmetries of a Rubik's Cube?

Fewest required values in magic square?

For which number does multiplying it by 99 add a 1 to each end of its decimal representation?

How many steps does it take the computer to solve a Sudoku puzzle?

Decryption Problem

any pattern here ? (revised 2)

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