List questions from recreational-mathematics

Published on 11 Feb 2019 - 22:51

195

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What is the smallest number of $45^\circ$–$60^\circ$–$75^\circ$ triangles in non-trivial substitution tiling?

Published on 25 Mar 2026 - 17:42

345

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Add the following numbers and find the answer?

Published on 15 Feb 2019 - 11:32

233

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Two doors, each either trapped or safe, have signs whose truth depends on certain circumstances. Each sign reads "Both doors are safe".

Published on 19 Feb 2019 - 21:23

153

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How to solve this problem raven matrices problem?

Published on 20 Feb 2019 - 11:26

1.1k

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Understanding solution to the secretary problem

Published on 20 Feb 2019 - 20:47

71

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How to compute the different number and ways to read a given phrase forming a pile or a stack?

Published on 26 Mar 2026 - 6:21

347

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Heesch numbers in 3D

Published on 25 Mar 2026 - 9:31

117

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Meaning of Maclaurin expansion of $e$

Published on 23 Mar 2026 - 17:32

51

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Partially Non-Computable Numbers

Published on 26 Mar 2026 - 6:18

640

Views

Why 0.33... is the only expression of 1/3?

Published on 25 Mar 2026 - 15:54

138

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"New Year falls more often on Sundays than on Mondays"

Published on 22 Mar 2026 - 9:27

69

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Why don't we generalize rotation by rotating parallel to a plane instead of around a point or line?

Published on 26 Mar 2026 - 19:18

75

Views

How do I prove that $ex/\ln(x)$ is the function traced out by the successive functions?

Published on 25 Mar 2026 - 15:47

74

Views

Are these pointing sequences periodic?

Published on 28 Feb 2019 - 22:37

List Question

An extension of $\mathbb{F}_p$ to an interval $[0,p]$ with $p \equiv 0$

What is the smallest number of $45^\circ$–$60^\circ$–$75^\circ$ triangles in non-trivial substitution tiling?

Add the following numbers and find the answer?

Two doors, each either trapped or safe, have signs whose truth depends on certain circumstances. Each sign reads "Both doors are safe".

How to solve this problem raven matrices problem?

Understanding solution to the secretary problem

How to compute the different number and ways to read a given phrase forming a pile or a stack?

Heesch numbers in 3D

Meaning of Maclaurin expansion of $e$

Partially Non-Computable Numbers

Why 0.33... is the only expression of 1/3?

"New Year falls more often on Sundays than on Mondays"

Why don't we generalize rotation by rotating parallel to a plane instead of around a point or line?

How do I prove that $ex/\ln(x)$ is the function traced out by the successive functions?

Are these pointing sequences periodic?

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