Question

What is the expected number of random moves to solve a jigsaw puzzle?

score 105 · Answer 1 · 2026-04-12 06:51:26

105

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What is the expected number of random moves to solve a jigsaw puzzle?

Published on 12 Apr 2026 - 6:51

score 219 · Answer 2 · 2026-05-05 13:41:28

219

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A $10$ digit number with distinct digits such that the following holds:

Published on 05 May 2026 - 13:41

score 1.8k · Answer 3 · 2026-04-14 22:38:50

1.8k

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Probability Puzzle- N letters 2 post boxes

Published on 14 Apr 2026 - 22:38

score 88 · Answer 4 · 2026-04-16 13:57:49

Place any number of parentheses into $1\div2\div3\div4\div5\div6\div7\div8\div9\div10$ to get the number $256/63$

score 35 · Answer 5 · 2026-04-11 14:21:20

35

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How to find the probability that the sum a discrete random variable is greater than k?

Published on 11 Apr 2026 - 14:21

score 2.8k · Answer 6 · 2026-04-09 06:13:03

2.8k

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Solving the cryptarithm $\mathrm{TWO}+\mathrm{TWO}=\mathrm{FOUR}$ in base $10$ and base $7$

Published on 09 Apr 2026 - 6:13

score 56 · Answer 7 · 2026-04-13 02:31:33

56

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Putting Pins in a Grid - UK Senior Maths Challenge

Published on 13 Apr 2026 - 2:31

score 82 · Answer 8 · 2026-04-13 00:58:31

82

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How many different "Dwayne" "The Rock" "Johnson" orderings can be made for $n$ Dwayne The Rock Johnsons?

Published on 13 Apr 2026 - 0:58

score 96 · Answer 9 · 2026-05-05 15:48:07

96

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Find the next term of $\frac14,1,\frac94,2+\frac2{\sqrt{3}}, \frac{5}{2} + \frac{5}{2 \sqrt{2}}, 3 + 3 \sqrt{\frac{1}{10} (5 + \sqrt{5})}$

Published on 05 May 2026 - 15:48

score 72 · Answer 10 · 2026-04-16 04:51:56

72

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$k$ isolated prisoners with hats, $n$ possible hat colors, $k$ tries to guess everyone's color after initial chat before hat assignment

Published on 16 Apr 2026 - 4:51

score 408 · Answer 11 · 2026-03-26 09:45:49

408

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Rearranging elements in a matrix

Published on 26 Mar 2026 - 9:45

score 90 · Answer 12 · 2026-04-12 02:30:43

90

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Paradox in definite integrals

Published on 12 Apr 2026 - 2:30

score 228 · Answer 13 · 2026-04-14 07:17:36

228

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Math fact family number triangles

Published on 14 Apr 2026 - 7:17

score 303 · Answer 14 · 2026-04-15 22:10:41

303

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Number of coins of integer weights

Published on 15 Apr 2026 - 22:10

score 527 · Answer 15 · 2026-04-16 04:37:43

527

Views

Find the least number of moves required.

Published on 16 Apr 2026 - 4:37

List Question

What is the expected number of random moves to solve a jigsaw puzzle?

A $10$ digit number with distinct digits such that the following holds:

Probability Puzzle- N letters 2 post boxes

Place any number of parentheses into $1\div2\div3\div4\div5\div6\div7\div8\div9\div10$ to get the number $256/63$

How to find the probability that the sum a discrete random variable is greater than k?

Solving the cryptarithm $\mathrm{TWO}+\mathrm{TWO}=\mathrm{FOUR}$ in base $10$ and base $7$

Putting Pins in a Grid - UK Senior Maths Challenge

How many different "Dwayne" "The Rock" "Johnson" orderings can be made for $n$ Dwayne The Rock Johnsons?

Find the next term of $\frac14,1,\frac94,2+\frac2{\sqrt{3}}, \frac{5}{2} + \frac{5}{2 \sqrt{2}}, 3 + 3 \sqrt{\frac{1}{10} (5 + \sqrt{5})}$

$k$ isolated prisoners with hats, $n$ possible hat colors, $k$ tries to guess everyone's color after initial chat before hat assignment

Rearranging elements in a matrix

Paradox in definite integrals

Math fact family number triangles

Number of coins of integer weights

Find the least number of moves required.

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