Question

Probability of seeing each face except one in $n$ throws of a die with 4 faces

score 103 · Answer 1 · 2026-04-14 19:23:45

103

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Probability of seeing each face except one in $n$ throws of a die with 4 faces

Published on 14 Apr 2026 - 19:23

score 525 · Answer 2 · 2026-04-13 20:46:30

525

Views

Solving the Japanese Rope and Ring Puzzle using Graph Theory

Published on 13 Apr 2026 - 20:46

score 42 · Answer 3 · 2026-04-15 11:55:00

42

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Do these infinite sequences (from day 15 of "advent of code 2020") permit cycles?

Published on 15 Apr 2026 - 11:55

score 142 · Answer 4 · 2026-04-12 03:41:21

142

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Mathematics puzzles

Published on 12 Apr 2026 - 3:41

score 173 · Answer 5 · 2026-04-12 17:41:05

173

Views

Expected steps to solve a 3x3 jigsaw puzzle

Published on 12 Apr 2026 - 17:41

score 102 · Answer 6 · 2026-04-14 10:22:53

102

Views

Why is the equal volume sufficient to solve the puzzle without any calculations?

Published on 14 Apr 2026 - 10:22

score 3.9k · Answer 7 · 2026-04-14 22:13:04

3.9k

Views

A $2021$ problem: $20\sim 21$ and $43\times 47$

Published on 14 Apr 2026 - 22:13

score 159 · Answer 8 · 2026-04-15 20:47:05

159

Views

Lines intersecting in a segment? Coloring the plane

Published on 15 Apr 2026 - 20:47

score 110 · Answer 9 · 2026-05-05 11:47:33

110

Views

Determining conditions on two circles inscribed in square so that a tangent rectangle has integer area

Published on 05 May 2026 - 11:47

score 2.2k · Answer 10 · 2026-04-15 15:14:06

2.2k

Views

Given $x$, $y$, $k$, convert $x$ to $y$ by multiplication by $k$ or subtraction of $1$ in the fewest steps

Published on 15 Apr 2026 - 15:14

score 495 · Answer 11 · 2026-04-12 05:18:30

495

Views

Elevator stops in building

Published on 12 Apr 2026 - 5:18

score 62 · Answer 12 · 2026-04-11 01:12:46

62

Views

Effective methods for this qustion.

Published on 11 Apr 2026 - 1:12

score 1.8k · Answer 13 · 2026-04-14 19:55:24

1.8k

Views

How few $(42^\circ,60^\circ,78^\circ)$ triangles can an equilateral triangle be divided into?

Published on 14 Apr 2026 - 19:55

score 123 · Answer 14 · 2026-04-11 16:58:18

123

Views

Does there exist an infinite path of one colored sub-tiles?

Published on 11 Apr 2026 - 16:58

score 234 · Answer 15 · 2026-04-08 17:15:08

234

Views

Cat and Mice puzzle!

Published on 08 Apr 2026 - 17:15

List Question

Probability of seeing each face except one in $n$ throws of a die with 4 faces

Solving the Japanese Rope and Ring Puzzle using Graph Theory

Do these infinite sequences (from day 15 of "advent of code 2020") permit cycles?

Mathematics puzzles

Expected steps to solve a 3x3 jigsaw puzzle

Why is the equal volume sufficient to solve the puzzle without any calculations?

A $2021$ problem: $20\sim 21$ and $43\times 47$

Lines intersecting in a segment? Coloring the plane

Determining conditions on two circles inscribed in square so that a tangent rectangle has integer area

Given $x$, $y$, $k$, convert $x$ to $y$ by multiplication by $k$ or subtraction of $1$ in the fewest steps

Elevator stops in building

Effective methods for this qustion.

How few $(42^\circ,60^\circ,78^\circ)$ triangles can an equilateral triangle be divided into?

Does there exist an infinite path of one colored sub-tiles?

Cat and Mice puzzle!

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