pigeon hole sequence problem
11934
Sitting in chairs with empty space
94295
Pigeonhole-principle with two choices
4592
Prison problem: locking or unlocking every $n$th door for $ n=1,2,3,...$
151935
Proving the predicate $\forall n \in \mathbb{N} , n \geq 2$ using the Pigeonhole principle
75852
Using Pigeonhole Principle to prove two numbers in a subset of $[2n]$ divide each other
102791
pigeonhole principle: at least 1 match/hr for 75 hrs, at most 125 matches, then exactly 24 matches in some interval
68882
Path to Combinatorics Problem [$1.11$]
107964
Simple combinatorics problem.
81567
Pigeon hole principle to prove $a-b=9$ in subset.
906
Pigeonhole Principle Question - Group of 6 people, do 3 either know each other or not?
127426
Greatest number in the sequence
87740
Pigeonhole Principle about division
80748
Question regarding the Fibonacci sequence
94923
Using the Pigeonhole Principle to show that $2$ of any $n+1$ numbers from $\{1,2,\ldots,2n\}$ sum to $2n+1$
127311
Challenging probability problem
35515
Find the number of $(m+n)$ digit binary sequences with $m$ $0$'s and $n$ $1$'s such that no two $1$'s are adjacent
45386
Fibonacci sequence emerging from integer partitioning