Question

Describe a random graph algebraically

score 67 · Answer 1 · 2026-04-16 03:02:10

67

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Describe a random graph algebraically

Published on 16 Apr 2026 - 3:02

score 85 · Answer 2 · 2026-04-14 03:04:33

85

Views

Distributing $4$ indistinguishable black marbles and $6$ distinguishable coloured marbles into $5$ distinguishable boxes.

Published on 14 Apr 2026 - 3:04

score 213 · Answer 3 · 2026-04-12 19:58:39

213

Views

Neat probability puzzle

Published on 12 Apr 2026 - 19:58

score 106 · Answer 4 · 2026-04-17 07:31:01

106

Views

Area of irregular equilateral hexagon

Published on 17 Apr 2026 - 7:31

score 104 · Answer 5 · 2026-04-11 00:15:57

104

Views

Evaluating $\sum_{k=0}^n(-1)^{\frac{k(k+1)}2}k$

Published on 11 Apr 2026 - 0:15

score 153 · Answer 6 · 2026-04-15 11:43:55

153

Views

The sum of $n$ terms in $1 \cdot 2+2 \cdot 3+3 \cdot 4+\ldots$

Published on 15 Apr 2026 - 11:43

score 131 · Answer 7 · 2026-05-14 19:15:59

131

Views

Finding the formula for a game experience

Published on 14 May 2026 - 19:15

score 224 · Answer 8 · 2026-04-10 15:50:54

224

Views

What is the optimal strategy for the generalized “Seven Candles” problem?

Published on 10 Apr 2026 - 15:50

score 146 · Answer 9 · 2026-04-14 03:34:40

146

Views

$8$-coin problem with $3$ balance scales ($1$ broken) and its generalization

Published on 14 Apr 2026 - 3:34

score 553 · Answer 10 · 2026-04-08 17:52:03

553

Views

How to build a protractor without a protractor?

Published on 08 Apr 2026 - 17:52

score 73 · Answer 11 · 2026-03-26 04:20:04

73

Views

Given a conditionally convergent series, can we group terms together retaining order, so that the quotient of consecutive groups tends to $1$?

Published on 26 Mar 2026 - 4:20

score 72 · Answer 12 · 2026-04-15 22:45:44

72

Views

Is there an easy way to see that $f_n(x) = x/n - \cos x$ for all $x\in \mathbb{R}$ has finitely many zeros for each $n$?

Published on 15 Apr 2026 - 22:45

score 81 · Answer 13 · 2026-04-15 00:31:12

81

Views

Find all numbers $n$ divisible by $a$ whose sum of digitis is $b$.

Published on 15 Apr 2026 - 0:31

score 287 · Answer 14 · 2026-04-12 16:43:48

287

Views

The number of four-digit numbers that have distinct digits and are divisible by $99$

Published on 12 Apr 2026 - 16:43

score 74 · Answer 15 · 2026-04-16 05:28:32

74

Views

find all positive integers n for which there exists a certain $n\times n$ table where each entry is I,M, or O

Published on 16 Apr 2026 - 5:28

List Question

Describe a random graph algebraically

Distributing $4$ indistinguishable black marbles and $6$ distinguishable coloured marbles into $5$ distinguishable boxes.

Neat probability puzzle

Area of irregular equilateral hexagon

Evaluating $\sum_{k=0}^n(-1)^{\frac{k(k+1)}2}k$

The sum of $n$ terms in $1 \cdot 2+2 \cdot 3+3 \cdot 4+\ldots$

Finding the formula for a game experience

What is the optimal strategy for the generalized “Seven Candles” problem?

$8$-coin problem with $3$ balance scales ($1$ broken) and its generalization

How to build a protractor without a protractor?

Given a conditionally convergent series, can we group terms together retaining order, so that the quotient of consecutive groups tends to $1$?

Is there an easy way to see that $f_n(x) = x/n - \cos x$ for all $x\in \mathbb{R}$ has finitely many zeros for each $n$?

Find all numbers $n$ divisible by $a$ whose sum of digitis is $b$.

The number of four-digit numbers that have distinct digits and are divisible by $99$

find all positive integers n for which there exists a certain $n\times n$ table where each entry is I,M, or O

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