List questions from puzzle

Published on 14 Apr 2026 - 16:01

815

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The sum of digits of $3(3x+3)$ is always $9$ for any $x$ between $1$ and $9$

Published on 14 Apr 2026 - 22:58

580

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Is there a mathematical way to determine a solution for puzzle games?

Published on 08 Apr 2026 - 2:58

1.3k

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Is my answer correct? Expected number of coin flips to get 5 consecutive heads

Published on 16 Apr 2026 - 0:43

178

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Probablity of $k$ balls go into at most (including) $m$ boxes, with $n$ given boxes ($m\le n\le k$)

Published on 13 Apr 2026 - 18:05

165

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Can this expression be made true ? 2 _ _ _ _ = 2015

Published on 13 Apr 2026 - 23:23

1.1k

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Finding real money on a strange weighing device

Published on 14 Apr 2026 - 21:46

855

Views

Sum numbers game with numbers $n,n-1,n-2,\ldots,3,2,1,2,3,\ldots,n-2,n-1,n$

Published on 15 Apr 2026 - 9:27

774

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Derive a formula for the number of small square base pyramids required to create a bigger pyramid?

Published on 14 Apr 2026 - 7:22

5.2k

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A math puzzle about slow clock

Published on 10 Apr 2026 - 0:59

126

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Puzzle: Determining the structure of a bipartite graph

Published on 12 Apr 2026 - 4:43

15.2k

Views

Is there a general solution to the water-bucket logic problem?

Published on 08 Apr 2026 - 19:09

787

Views

Find the missing dollar

Published on 11 Apr 2026 - 6:30

514

Views

Balancing the weights of the vertices of a graph by averaging along the edges.

Published on 16 Apr 2026 - 17:01

156

Views

Frazzle game question

Published on 13 Apr 2026 - 12:02

List Question

Number of ways through a modified grid

The sum of digits of $3(3x+3)$ is always $9$ for any $x$ between $1$ and $9$

Is there a mathematical way to determine a solution for puzzle games?

Is my answer correct? Expected number of coin flips to get 5 consecutive heads

Probablity of $k$ balls go into at most (including) $m$ boxes, with $n$ given boxes ($m\le n\le k$)

Can this expression be made true ? 2 _ _ _ _ = 2015

Finding real money on a strange weighing device

Sum numbers game with numbers $n,n-1,n-2,\ldots,3,2,1,2,3,\ldots,n-2,n-1,n$

Derive a formula for the number of small square base pyramids required to create a bigger pyramid?

A math puzzle about slow clock

Puzzle: Determining the structure of a bipartite graph

Is there a general solution to the water-bucket logic problem?

Find the missing dollar

Balancing the weights of the vertices of a graph by averaging along the edges.

Frazzle game question

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