Question

Just using $+$ ,$-$, $\times$ using any given n-1 integers, can we make a number divisible by n? (NO bracket allowed!!)

score 552 · Answer 1 · 2026-05-06 02:23:42

552

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Just using $+$ ,$-$, $\times$ using any given n-1 integers, can we make a number divisible by n? (NO bracket allowed!!)

Published on 06 May 2026 - 2:23

score 849 · Answer 2 · 2026-05-15 22:52:56

849

Views

Best strategy for cheating in the "cheating royal riddle"

Published on 15 May 2026 - 22:52

score 108 · Answer 3 · 2026-05-16 17:14:05

108

Views

Chinese Checkers Puzzle: Pawns Movement

Published on 16 May 2026 - 17:14

score 687 · Answer 4 · 2026-04-10 13:16:38

687

Views

Optimal strategy for guessing a binary string

Published on 10 Apr 2026 - 13:16

score 88 · Answer 5 · 2026-04-14 22:38:38

88

Views

In a game of Lights Off, how many light configurations are valid given a starting position?

Published on 14 Apr 2026 - 22:38

score 388 · Answer 6 · 2026-05-06 02:22:35

388

Views

A new coin and balance problem

Published on 06 May 2026 - 2:22

score 356 · Answer 7 · 2026-04-10 22:45:58

356

Views

Inductive proof for the Muddy Children Puzzle

Published on 10 Apr 2026 - 22:45

score 176 · Answer 8 · 2026-05-06 03:20:44

176

Views

Can you explain this answer to Bellman's Lost in a Forest in 3D?

Published on 06 May 2026 - 3:20

score 201 · Answer 9 · 2026-04-12 21:37:58

201

Views

The origin of "The Lost Boarding Pass Problem"

Published on 12 Apr 2026 - 21:37

score 487 · Answer 10 · 2026-04-13 03:25:25

487

Views

Chimp and Guavas

Published on 13 Apr 2026 - 3:25

score 206 · Answer 11 · 2026-05-06 03:22:43

206

Views

Coin weighing puzzle: one heavy coin, one light coin, which together weigh the same as two normal coins

Published on 06 May 2026 - 3:22

score 36 · Answer 12 · 2026-04-16 04:08:54

36

Views

How far is $A$ from $Q$ when he meets $B$ for the $22nd$ time? : Speed, Time and Distance Problem

Published on 16 Apr 2026 - 4:08

score 590 · Answer 13 · 2026-05-06 04:29:52

590

Views

8 coins lying on the table; you can flip one at a time; what is the minimum number of flips to get all heads or all tails?

Published on 06 May 2026 - 4:29

score 69 · Answer 14 · 2026-05-16 14:55:18

69

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Given a set $S$ of real numbers, find the smallest set $A$ such that every element of $S$ can be expressed as a sum of distinct elements of $A$.

Published on 16 May 2026 - 14:55

score 330 · Answer 15 · 2026-04-11 03:55:40

330

Views

A biased coin flipping game strategy.

Published on 11 Apr 2026 - 3:55

List Question

Just using $+$ ,$-$, $\times$ using any given n-1 integers, can we make a number divisible by n? (NO bracket allowed!!)

Best strategy for cheating in the "cheating royal riddle"

Chinese Checkers Puzzle: Pawns Movement

Optimal strategy for guessing a binary string

In a game of Lights Off, how many light configurations are valid given a starting position?

A new coin and balance problem

Inductive proof for the Muddy Children Puzzle

Can you explain this answer to Bellman's Lost in a Forest in 3D?

The origin of "The Lost Boarding Pass Problem"

Chimp and Guavas

Coin weighing puzzle: one heavy coin, one light coin, which together weigh the same as two normal coins

How far is $A$ from $Q$ when he meets $B$ for the $22nd$ time? : Speed, Time and Distance Problem

8 coins lying on the table; you can flip one at a time; what is the minimum number of flips to get all heads or all tails?

Given a set $S$ of real numbers, find the smallest set $A$ such that every element of $S$ can be expressed as a sum of distinct elements of $A$.

A biased coin flipping game strategy.

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