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Using differential equations to determine the number of rolls on a roll of toilet paper

score 1.3k · Answer 1 · 2026-04-13 21:37:05

1.3k

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Using differential equations to determine the number of rolls on a roll of toilet paper

Published on 13 Apr 2026 - 21:37

score 71 · Answer 2 · 2026-04-13 22:49:14

71

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Milk pouring problem

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120

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Densest way to place dominoes/duoplets in an infinite grid with some restrictions

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score 239 · Answer 4 · 2026-04-14 16:27:03

The outside of a $180$-sheet roll of toilet paper is covered by two sheets; the inner cylinder, by one. What's wrong with how I counted the layers?

score 252 · Answer 5 · 2026-04-11 21:02:16

252

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177

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score 840 · Answer 7 · 2026-04-10 23:44:50

840

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How to construct an equilateral triangle on 2 concentric circles

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score 1.7k · Answer 8 · 2026-04-14 03:45:08

1.7k

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The Four Fours puzzle using only $+$, $-$, $\times$, $\div$, $\sqrt{}$, and concatenation. Can we make $19$?

Published on 14 Apr 2026 - 3:45

score 300 · Answer 9 · 2026-04-13 01:52:18

300

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363

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score 271 · Answer 11 · 2026-04-14 14:59:55

271

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score 468 · Answer 12 · 2026-04-13 14:36:46

468

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Published on 13 Apr 2026 - 14:36

score 96 · Answer 13 · 2026-04-12 01:31:14

96

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score 185 · Answer 14 · 2026-04-13 16:08:43

Jigsaw puzzle in which each piece has 3 tab and 1 blank. How to check if given number of rows and columns, the puzzle is solvable or not?

score 70 · Answer 15 · 2026-04-13 01:34:17

70

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Hint on the Fifteen (Slide Puzzle) Problem?

Published on 13 Apr 2026 - 1:34

List Question

Using differential equations to determine the number of rolls on a roll of toilet paper

Milk pouring problem

Densest way to place dominoes/duoplets in an infinite grid with some restrictions

The outside of a $180$-sheet roll of toilet paper is covered by two sheets; the inner cylinder, by one. What's wrong with how I counted the layers?

Tabasco sauce: a mathematical diversion

Thesis on finding "god's number" for puzzle game Lunar Lockout (renamed to Lunar Landing)

How to construct an equilateral triangle on 2 concentric circles

The Four Fours puzzle using only $+$, $-$, $\times$, $\div$, $\sqrt{}$, and concatenation. Can we make $19$?

A generalization of a classic table-turning puzzle

Arithmetic Puzzle

Logic/probability riddle

In the Library of Count Dracula

Determine the best strategy for Bob in this game

Jigsaw puzzle in which each piece has 3 tab and 1 blank. How to check if given number of rows and columns, the puzzle is solvable or not?

Hint on the Fifteen (Slide Puzzle) Problem?

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