Question

How many sequences length $n$, taken from $\{1,2,3,...,k\}$ that the sum of the $n$ elements in the sequence will be divisible by $k$.

score 399 · Answer 1 · 2018-08-10 15:02:21

399

Views

How many sequences length $n$, taken from $\{1,2,3,...,k\}$ that the sum of the $n$ elements in the sequence will be divisible by $k$.

Published on 10 Aug 2018 - 15:02

score 258 · Answer 2 · 2018-08-11 15:19:10

258

Views

Let S be a Set and let A be a subset of S. how many options there are to choose 2 subsets from S that their intersection is exactly A?

Published on 11 Aug 2018 - 15:19

score 74 · Answer 3 · 2018-08-20 10:23:26

74

Views

The number of ways to pile n white circles, when in the bottom row there are n white circles?

Published on 20 Aug 2018 - 10:23

score 211 · Answer 4 · 2018-08-20 11:00:37

211

Views

Finding the amount partitions with gives sizes of a multiset

Published on 20 Aug 2018 - 11:00

score 71 · Answer 5 · 2018-08-27 17:34:56

71

Views

Number of $n\times n$ matrices with fixed columns sums and only one non-zero elements among each row

Published on 27 Aug 2018 - 17:34

score 200 · Answer 6 · 2026-03-22 08:15:19

200

Views

Proving that a map is bijective

Published on 22 Mar 2026 - 8:15

score 263 · Answer 7 · 2026-03-22 07:45:39

263

Views

An infinite division and balls problem

Published on 22 Mar 2026 - 7:45

score 108 · Answer 8 · 2018-09-26 14:07:46

108

Views

Simplify a weighted average with enumerations as weights

Published on 26 Sep 2018 - 14:07

score 52 · Answer 9 · 2026-03-21 18:05:39

52

Views

Strange sum notation

Published on 21 Mar 2026 - 18:05

score 55 · Answer 10 · 2018-10-09 13:39:05

55

Views

Family of multisets that generates the smallest covering

Published on 09 Oct 2018 - 13:39

score 776 · Answer 11 · 2018-10-09 19:56:21

776

Views

Prove set of primes is equal to set of natural numbers

Published on 09 Oct 2018 - 19:56

score 91 · Answer 12 · 2018-10-14 18:27:43

91

Views

8-element permutations of a multiset {3:0,1:1,1:3,1:5,1:8,1:9} with the restriction 0 is not allowed in left or rightmost position

Published on 14 Oct 2018 - 18:27

score 416 · Answer 13 · 2018-11-06 22:13:33

416

Views

How to define a map from a multiset to a multiset

Published on 06 Nov 2018 - 22:13

score 89 · Answer 14 · 2026-03-24 16:11:44

89

Views

Category of Multisets and Spans

Published on 24 Mar 2026 - 16:11

score 45 · Answer 15 · 2018-12-03 01:33:09

45

Views

Most efficient set of characters for cracking passwords (Parallelized)?

Published on 03 Dec 2018 - 1:33

List Question

How many sequences length $n$, taken from $\{1,2,3,...,k\}$ that the sum of the $n$ elements in the sequence will be divisible by $k$.

Let S be a Set and let A be a subset of S. how many options there are to choose 2 subsets from S that their intersection is exactly A?

The number of ways to pile n white circles, when in the bottom row there are n white circles?

Finding the amount partitions with gives sizes of a multiset

Number of $n\times n$ matrices with fixed columns sums and only one non-zero elements among each row

Proving that a map is bijective

An infinite division and balls problem

Simplify a weighted average with enumerations as weights

Strange sum notation

Family of multisets that generates the smallest covering

Prove set of primes is equal to set of natural numbers

8-element permutations of a multiset {3:0,1:1,1:3,1:5,1:8,1:9} with the restriction 0 is not allowed in left or rightmost position

How to define a map from a multiset to a multiset

Category of Multisets and Spans

Most efficient set of characters for cracking passwords (Parallelized)?

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