Question

How to calculate mean and variance of harmonic mean

score 174 · Answer 1 · 2019-03-11 02:16:59

174

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How to calculate mean and variance of harmonic mean

Published on 11 Mar 2019 - 2:16

score 43 · Answer 2 · 2026-03-30 15:29:13

43

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Permutation/Combination - Officers and Age Restriction

Published on 30 Mar 2026 - 15:29

score 75 · Answer 3 · 2026-03-25 17:18:49

75

Views

How many even numbers could be formed

Published on 25 Mar 2026 - 17:18

score 121 · Answer 4 · 2019-03-12 17:55:19

121

Views

Maximum order of a polynomial permutation of a finite ring

Published on 12 Mar 2019 - 17:55

score 213 · Answer 5 · 2019-03-12 18:41:53

213

Views

Permutations with same order are conjugate?

Published on 12 Mar 2019 - 18:41

score 1k · Answer 6 · 2026-03-25 12:57:55

1k

Views

Characterisation of permutation matrices

Published on 25 Mar 2026 - 12:57

score 77 · Answer 7 · 2026-04-01 23:31:30

77

Views

Possible n-uplets that are the difference term by term of two permutations

Published on 01 Apr 2026 - 23:31

score 808 · Answer 8 · 2019-03-12 21:20:43

808

Views

Special properties to calculate the power of a permutation

Published on 12 Mar 2019 - 21:20

score 190 · Answer 9 · 2019-03-12 22:54:01

190

Views

If a group $G\leq S_{13}$ has an element of order $40$, then $G$ has a normal non-trivial subgroup.

Published on 12 Mar 2019 - 22:54

score 138 · Answer 10 · 2019-03-13 01:51:26

138

Views

Find $(a_1, a_2, ..., a_n)^{-1}$

Published on 13 Mar 2019 - 1:51

score 46 · Answer 11 · 2019-03-13 11:27:46

46

Views

Composition of Permutations, and Expressing a Product of Disjoint Cycles as a Product of Transpositions

Published on 13 Mar 2019 - 11:27

score 692 · Answer 12 · 2026-03-27 21:18:57

692

Views

How many five digit numbers formed from digits $1,2,3,4,5$ (used exactly once) are divisible by $12$?

Published on 27 Mar 2026 - 21:18

score 822 · Answer 13 · 2026-03-25 13:58:08

822

Views

What are the smallest sets of $n$-permutations of $\{1, 2, \ldots, n\}$ where all n-combinations are "prefix-permutation" of one element of the set?

Published on 25 Mar 2026 - 13:58

score 1.3k · Answer 14 · 2026-03-30 15:30:02

1.3k

Views

Round Robin draw for 8 teams on 4 greens

Published on 30 Mar 2026 - 15:30

score 126 · Answer 15 · 2019-03-13 16:18:16

126

Views

Find number of numerical digits in all possible hexadecimal numbers of length n

Published on 13 Mar 2019 - 16:18

List Question

How to calculate mean and variance of harmonic mean

Permutation/Combination - Officers and Age Restriction

How many even numbers could be formed

Maximum order of a polynomial permutation of a finite ring

Permutations with same order are conjugate?

Characterisation of permutation matrices

Possible n-uplets that are the difference term by term of two permutations

Special properties to calculate the power of a permutation

If a group $G\leq S_{13}$ has an element of order $40$, then $G$ has a normal non-trivial subgroup.

Find $(a_1, a_2, ..., a_n)^{-1}$

Composition of Permutations, and Expressing a Product of Disjoint Cycles as a Product of Transpositions

How many five digit numbers formed from digits $1,2,3,4,5$ (used exactly once) are divisible by $12$?

What are the smallest sets of $n$-permutations of $\{1, 2, \ldots, n\}$ where all n-combinations are "prefix-permutation" of one element of the set?

Round Robin draw for 8 teams on 4 greens

Find number of numerical digits in all possible hexadecimal numbers of length n

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