Question

Can we model the number of increasing words as ball-and-urn problem?

score 110 · Answer 1 · 2026-04-10 23:26:53

110

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Can we model the number of increasing words as ball-and-urn problem?

Published on 10 Apr 2026 - 23:26

score 42 · Answer 2 · 2026-04-13 04:02:30

42

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All the combinations of word with length of 5 divided to groups

Published on 13 Apr 2026 - 4:02

score 2.9k · Answer 3 · 2026-04-10 10:53:27

2.9k

Views

Permutations with Repetition Formula

Published on 10 Apr 2026 - 10:53

score 37 · Answer 4 · 2026-04-16 00:53:06

37

Views

Let $A$ be a primitive $(0, 1)$-matrix of order $n$, and $\cdots$ then $\text{exp} (A) \leq n + l(n − 2).$

Published on 16 Apr 2026 - 0:53

score 351 · Answer 5 · 2026-04-09 05:32:57

351

Views

Combinatorics problem with bit-strings

Published on 09 Apr 2026 - 5:32

score 344 · Answer 6 · 2026-04-17 10:03:03

344

Views

Slot machine probabilities?

Published on 17 Apr 2026 - 10:03

score 124 · Answer 7 · 2026-04-10 03:01:58

124

Views

River crossing with boat

Published on 10 Apr 2026 - 3:01

score 426 · Answer 8 · 2026-04-13 19:49:02

Number of ways 24 students of 12 boys and 12 girls, how many ways can be separated into groups of 3 if all groups have to be mixed gender?

score 66 · Answer 9 · 2026-04-14 19:58:41

66

Views

Real number 1-Vertex labelling without injectivity

Published on 14 Apr 2026 - 19:58

score 100 · Answer 10 · 2026-04-10 10:30:45

100

Views

Different ways to divide identical objects into groups

Published on 10 Apr 2026 - 10:30

score 775 · Answer 11 · 2026-04-15 17:04:49

775

Views

Number of binary strings of length $n$, where every $1$, if any, is followed by at most $k$ $0$s

Published on 15 Apr 2026 - 17:04

score 129 · Answer 12 · 2026-04-12 12:22:23

129

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Probability of getting $x$ dice with the same numbers of $n$ dice thrown once together

Published on 12 Apr 2026 - 12:22

score 6.3k · Answer 13 · 2026-04-19 10:10:47

What is the minimum number of integers selected from set $S = \{1,2, 3, 4, 5, 6, 7, 8, 9\}$ such that the sum of two of the $n$ integers is even?

score 94 · Answer 14 · 2026-04-15 13:22:15

94

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Number of ways to distribute $10$ different books to three children such that they get $3$, $3$ and $4$

Published on 15 Apr 2026 - 13:22

score 316 · Answer 15 · 2026-04-15 21:11:21

316

Views

Find the total number of factors (excluding $1$) of $2160$.

Published on 15 Apr 2026 - 21:11

List Question

Can we model the number of increasing words as ball-and-urn problem?

All the combinations of word with length of 5 divided to groups

Permutations with Repetition Formula

Let $A$ be a primitive $(0, 1)$-matrix of order $n$, and $\cdots$ then $\text{exp} (A) \leq n + l(n − 2).$

Combinatorics problem with bit-strings

Slot machine probabilities?

River crossing with boat

Number of ways 24 students of 12 boys and 12 girls, how many ways can be separated into groups of 3 if all groups have to be mixed gender?

Real number 1-Vertex labelling without injectivity

Different ways to divide identical objects into groups

Number of binary strings of length $n$, where every $1$, if any, is followed by at most $k$ $0$s

Probability of getting $x$ dice with the same numbers of $n$ dice thrown once together

What is the minimum number of integers selected from set $S = \{1,2, 3, 4, 5, 6, 7, 8, 9\}$ such that the sum of two of the $n$ integers is even?

Number of ways to distribute $10$ different books to three children such that they get $3$, $3$ and $4$

Find the total number of factors (excluding $1$) of $2160$.

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