Question

What is the minimum number of passwords needed to guarantee that at least $2$ passwords have the same number of lower case letters?

score 318 · Answer 1 · 2026-03-25 04:19:09

318

Views

What is the minimum number of passwords needed to guarantee that at least $2$ passwords have the same number of lower case letters?

Published on 25 Mar 2026 - 4:19

score 3.1k · Answer 2 · 2026-03-28 05:28:56

3.1k

Views

Proving that a plane triangulation is 3-colorable iff it's even, using faces?

Published on 28 Mar 2026 - 5:28

score 751 · Answer 3 · 2018-04-03 09:36:21

What is the probability that exactly two jacks, two queens, and two kings have been picked from the deck when the second ace turns up

score 170 · Answer 4 · 2026-03-26 06:29:51

170

Views

Combinations of n items that fill the entire volume

Published on 26 Mar 2026 - 6:29

score 40 · Answer 5 · 2026-04-03 21:19:57

40

Views

Finding parameters in combinatorics

Published on 03 Apr 2026 - 21:19

score 102 · Answer 6 · 2026-03-26 00:58:52

102

Views

Using a generating function to solve combinatorics problems with ice cream sundaes

Published on 26 Mar 2026 - 0:58

score 129 · Answer 7 · 2026-03-30 13:18:26

129

Views

Combinatorial proof: $\sum_k {n+1 \brack k}k = {n+2 \brack 2}$

Published on 30 Mar 2026 - 13:18

score 62 · Answer 8 · 2026-04-04 02:53:10

62

Views

Shrinking size of search space using only conjunctions in machine learning

Published on 04 Apr 2026 - 2:53

score 348 · Answer 9 · 2026-04-05 21:18:29

348

Views

Orthogonal $4x4$ Latin Squares

Published on 05 Apr 2026 - 21:18

score 819 · Answer 10 · 2026-04-03 23:06:00

How many different terms are there in the expansion of $(x_1 + x_2 + \cdots + x_m)^n$ after all terms with identical sets of exponents are added?

score 291 · Answer 11 · 2026-03-26 06:23:12

291

Views

Number of ways to write a number $N$ as the sum of $M$ natural numbers, where order doesn't matter?

Published on 26 Mar 2026 - 6:23

score 93 · Answer 12 · 2026-03-25 02:56:37

93

Views

Alternating series whose partial sums changes

Published on 25 Mar 2026 - 2:56

score 38 · Answer 13 · 2018-04-03 22:47:51

38

Views

Combinatorics and Probability with Dice

Published on 03 Apr 2018 - 22:47

score 31 · Answer 14 · 2026-03-25 07:39:48

31

Views

Counting how many functions exist given a relation

Published on 25 Mar 2026 - 7:39

score 74 · Answer 15 · 2026-03-25 07:43:05

74

Views

Number of paths intersecting in exactly k edges

Published on 25 Mar 2026 - 7:43

List Question

What is the minimum number of passwords needed to guarantee that at least $2$ passwords have the same number of lower case letters?

Proving that a plane triangulation is 3-colorable iff it's even, using faces?

What is the probability that exactly two jacks, two queens, and two kings have been picked from the deck when the second ace turns up

Combinations of n items that fill the entire volume

Finding parameters in combinatorics

Using a generating function to solve combinatorics problems with ice cream sundaes

Combinatorial proof: $\sum_k {n+1 \brack k}k = {n+2 \brack 2}$

Shrinking size of search space using only conjunctions in machine learning

Orthogonal $4x4$ Latin Squares

How many different terms are there in the expansion of $(x_1 + x_2 + \cdots + x_m)^n$ after all terms with identical sets of exponents are added?

Number of ways to write a number $N$ as the sum of $M$ natural numbers, where order doesn't matter?

Alternating series whose partial sums changes

Combinatorics and Probability with Dice

Counting how many functions exist given a relation

Number of paths intersecting in exactly k edges

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