Question

Arrangements of the word COMBINATION not containing CAN, BIN, NIB

score 171 · Answer 1 · 2026-04-12 23:34:52

171

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Arrangements of the word COMBINATION not containing CAN, BIN, NIB

Published on 12 Apr 2026 - 23:34

score 142 · Answer 2 · 2026-05-11 03:42:17

142

Views

Dudo Game - Conditional Expectation

Published on 11 May 2026 - 3:42

score 61 · Answer 3 · 2026-04-11 14:02:37

61

Views

What is the intuition behind the resolution method for this problem?

Published on 11 Apr 2026 - 14:02

score 178 · Answer 4 · 2026-04-15 09:57:06

178

Views

Selecting a security team that includes at most one of the oldest man or oldest woman

Published on 15 Apr 2026 - 9:57

score 346 · Answer 5 · 2026-04-17 04:58:51

346

Views

How can we evaluate the sequence ${}_3C_1+{}_7C_2+{}_{11}C_3+\dots+{}_{4n-1}C_n=$?

Published on 17 Apr 2026 - 4:58

score 94 · Answer 6 · 2026-04-10 10:53:48

94

Views

Pigeonhole Principle in combinatorics

Published on 10 Apr 2026 - 10:53

score 271 · Answer 7 · 2026-04-13 16:56:52

271

Views

BMO1 2001 Problem 4

Published on 13 Apr 2026 - 16:56

score 804 · Answer 8 · 2026-05-16 00:09:53

804

Views

Number of Non negative integer solutions of $x+2y+5z=100$

Published on 16 May 2026 - 0:09

score 55 · Answer 9 · 2026-04-17 01:05:14

55

Views

A Combinatorics Problem: What's Wrong With My Method

Published on 17 Apr 2026 - 1:05

score 51 · Answer 10 · 2026-04-11 07:46:06

51

Views

Closed form for a summation.

Published on 11 Apr 2026 - 7:46

score 706 · Answer 11 · 2026-05-11 09:32:56

706

Views

How many trees are there on vertex set $[n]$ that contain a given edge $uv$?

Published on 11 May 2026 - 9:32

score 59 · Answer 12 · 2026-04-13 20:10:06

59

Views

Can all of the first and second differences of a Costas array be at least 3 in magnitude?

Published on 13 Apr 2026 - 20:10

score 318 · Answer 13 · 2026-04-16 01:53:59

318

Views

How many different pairs of integers $(x,y)$ modulo $p$ such that $ax^2+by^2+c \equiv 0\pmod{p}$?

Published on 16 Apr 2026 - 1:53

score 42 · Answer 14 · 2026-04-17 14:56:06

42

Views

Teachers and Students sitting in a line with a condition

Published on 17 Apr 2026 - 14:56

score 76 · Answer 15 · 2026-04-08 07:06:37

76

Views

Recurrence Relation Trouble Understanding Where I Went Wrong

Published on 08 Apr 2026 - 7:06

List Question

Arrangements of the word COMBINATION not containing CAN, BIN, NIB

Dudo Game - Conditional Expectation

What is the intuition behind the resolution method for this problem?

Selecting a security team that includes at most one of the oldest man or oldest woman

How can we evaluate the sequence ${}_3C_1+{}_7C_2+{}_{11}C_3+\dots+{}_{4n-1}C_n=$?

Pigeonhole Principle in combinatorics

BMO1 2001 Problem 4

Number of Non negative integer solutions of $x+2y+5z=100$

A Combinatorics Problem: What's Wrong With My Method

Closed form for a summation.

How many trees are there on vertex set $[n]$ that contain a given edge $uv$?

Can all of the first and second differences of a Costas array be at least 3 in magnitude?

How many different pairs of integers $(x,y)$ modulo $p$ such that $ax^2+by^2+c \equiv 0\pmod{p}$?

Teachers and Students sitting in a line with a condition

Recurrence Relation Trouble Understanding Where I Went Wrong

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