3 steps to find one of 12 balls
32181
A logic puzzle involving a balance.
45699
How can I know in which direction 2 balls will go in billiard game?
62698
Multiple colliding balls
14139
$(12)$ and $(123\dots n)$ are generators of $S_n$
68882
Path to Combinatorics Problem [$1.11$]
97265
count the ways to fill a $4\times n$ board with dominoes
158381
Distinct balls into distinct boxes
29887
Pigeon Hole Principle Problem I'm kind of lost for how to go about this.
150726
determine the least number of rounds that needs to be played so that every child is satisfied
43076
Chess tournament combinatorics
72051
Sinking cue ball after the 8 ball in pool
114115
Probability: $n$ balls into $n$ holes with exactly one hole remaining empty
132921
Counting problem, number of moves
2720
8 ball Pool: Left only with black ball
81217
Fastest way to find out minimum of 3 numbers?
82281
Flipping a fair coin three times: How to find independent/dependent events?
27243
American 8 Ball Pool - Sinking opponent's ball