Question

Derangement Numbers within a sum

score 147 · Answer 1 · 2026-04-06 05:29:34

147

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Derangement Numbers within a sum

Published on 06 Apr 2026 - 5:29

score 296 · Answer 2 · 2019-09-25 19:14:53

296

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Combinatorics. How many ways can you split 8 people into pairs for the game of bridge.

Published on 25 Sep 2019 - 19:14

score 501 · Answer 3 · 2019-09-25 19:33:30

501

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Each vehicle has a number plate: 0001-9999, what is the chance that 2 random cars will have identical digit in their plate?

Published on 25 Sep 2019 - 19:33

score 136 · Answer 4 · 2019-09-26 00:55:10

136

Views

Find $\alpha$ and $\beta$ such that ord($\alpha$) = 3 and ord($\beta$) = 3, and ord($\alpha \beta$) = 10

Published on 26 Sep 2019 - 0:55

score 699 · Answer 5 · 2019-09-26 20:34:06

699

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How can you count the number of permutations that have a given number of inversions?

Published on 26 Sep 2019 - 20:34

score 95 · Answer 6 · 2026-03-25 20:40:13

95

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Permutation Cycle Proof

Published on 25 Mar 2026 - 20:40

score 780 · Answer 7 · 2026-03-27 13:47:31

780

Views

Stabilizer (orbit) of polynomials and Galois group and correspondence

Published on 27 Mar 2026 - 13:47

score 439 · Answer 8 · 2019-09-28 10:19:20

439

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Number of special ordered set

Published on 28 Sep 2019 - 10:19

score 97 · Answer 9 · 2019-09-28 15:56:45

97

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Number of ways to assign $n + 1$ to $n$ teaching assistants if each T. A. can have more than one student

Published on 28 Sep 2019 - 15:56

score 64 · Answer 10 · 2026-03-25 13:35:00

64

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Given three positive numbers $x,y,z$ so that $xyz=1, xy+yz+zx=5$. Find the maximum value $x^{c}+ y^{c}+ z^{c}$ for $c\geqq -1$ .

Published on 25 Mar 2026 - 13:35

score 606 · Answer 11 · 2019-09-29 20:27:46

606

Views

Dancing pairs question, how many ways you can have 5 dancing pairs from 6 boys and 7 girls?

Published on 29 Sep 2019 - 20:27

score 237 · Answer 12 · 2026-03-25 07:43:14

237

Views

Subgroup generated by a set of permutations in $S_6$

Published on 25 Mar 2026 - 7:43

score 59 · Answer 13 · 2019-09-30 09:54:26

59

Views

How many $4$-letter words can be formed with letters of the word "SUSTSTE" where the first letter is 'S' and last is 'T'?

Published on 30 Sep 2019 - 9:54

score 220 · Answer 14 · 2019-09-30 09:55:19

220

Views

In how many ways can a coach form a football team from $20$ players?

Published on 30 Sep 2019 - 9:55

score 416 · Answer 15 · 2019-09-30 13:56:16

416

Views

Permutations and Combinations in Circular Arrangement

Published on 30 Sep 2019 - 13:56

List Question

Derangement Numbers within a sum

Combinatorics. How many ways can you split 8 people into pairs for the game of bridge.

Each vehicle has a number plate: 0001-9999, what is the chance that 2 random cars will have identical digit in their plate?

Find $\alpha$ and $\beta$ such that ord($\alpha$) = 3 and ord($\beta$) = 3, and ord($\alpha \beta$) = 10

How can you count the number of permutations that have a given number of inversions?

Permutation Cycle Proof

Stabilizer (orbit) of polynomials and Galois group and correspondence

Number of special ordered set

Number of ways to assign $n + 1$ to $n$ teaching assistants if each T. A. can have more than one student

Given three positive numbers $x,y,z$ so that $xyz=1, xy+yz+zx=5$. Find the maximum value $x^{c}+ y^{c}+ z^{c}$ for $c\geqq -1$ .

Dancing pairs question, how many ways you can have 5 dancing pairs from 6 boys and 7 girls?

Subgroup generated by a set of permutations in $S_6$

How many $4$-letter words can be formed with letters of the word "SUSTSTE" where the first letter is 'S' and last is 'T'?

In how many ways can a coach form a football team from $20$ players?

Permutations and Combinations in Circular Arrangement

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