List questions from recreational-mathematics

Published on 29 Mar 2026 - 8:13

128

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$n$ is twice the sum of squares of digits of $n$

Published on 10 Dec 2014 - 21:18

683

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The 'Unlock All Digits' Game

Published on 11 Dec 2014 - 18:36

13.1k

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What is the "fastest" increasing function that's useful in some area of math?

Published on 25 Mar 2026 - 4:40

104

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Solving a reaction-diffusion problem using Separation of Variables

Published on 17 Dec 2014 - 7:04

219

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subtle/annoying fallacious proofs

Published on 28 Mar 2026 - 0:36

109

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Where can Gaussian Elimination be used?

Published on 26 Mar 2026 - 2:58

88

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How to calculate 2-d plane from 3 4-d points?

Published on 20 Dec 2014 - 4:28

224

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Puzzling Sequence

Published on 20 Dec 2014 - 11:49

157

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Analytic solutions to a simple math trick

Published on 22 Dec 2014 - 0:02

10.4k

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Function whose third derivative is itself.

Published on 24 Dec 2014 - 18:47

1.3k

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Xmas Maths 2014

Published on 26 Dec 2014 - 9:33

356

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Why does strategy-stealing not work for Go?

Published on 28 Mar 2026 - 17:05

219

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Is there a proof that zero multiplied by infinity = a real number

Published on 28 Mar 2026 - 6:48

4.8k

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Possible mathematical finishes to the darts game 501

Published on 29 Dec 2014 - 0:16

List Question

Solving 9 sons puzzle

$n$ is twice the sum of squares of digits of $n$

The 'Unlock All Digits' Game

What is the "fastest" increasing function that's useful in some area of math?

Solving a reaction-diffusion problem using Separation of Variables

subtle/annoying fallacious proofs

Where can Gaussian Elimination be used?

How to calculate 2-d plane from 3 4-d points?

Puzzling Sequence

Analytic solutions to a simple math trick

Function whose third derivative is itself.

Xmas Maths 2014

Why does strategy-stealing not work for Go?

Is there a proof that zero multiplied by infinity = a real number

Possible mathematical finishes to the darts game 501

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