25
votes
Twenty-four trees in eighteen rows of four
mathematics
geometry
asked May 30, 2022 at 21:11
puzzling.stackexchange.com
25
votes
Tiling a square with right-angled triangles
tiling
asked Feb 1, 2024 at 0:05
puzzling.stackexchange.com
25
votes
A pair of Find-the-stars puzzles
logical-deduction
grid-deduction
asked yesterday
puzzling.stackexchange.com
24
votes
How do you measure exactly 31 minutes by burning the ropes?
strategy
time
asked Sep 27, 2024 at 7:11
puzzling.stackexchange.com
23
votes
What’s the highest salary the greedy king can arrange for himself?
mathematics
optimization
asked Jun 30, 2024 at 6:52
puzzling.stackexchange.com
23
votes
You are at a crossroads with five roads leading away from it
optimization
coin-tossing
asked Dec 31, 2023 at 4:57
puzzling.stackexchange.com
23
votes
Starting with a pile of 1,001 rocks, discarding some and splitting up the piles, can you eventually have all piles with exactly 3 rocks?
mathematics
combinatorics
nim
asked Mar 16 at 3:10
puzzling.stackexchange.com
22
votes
Can you find a 3x3 white square somewhere in this relatively prime graph?
mathematics
number-theory
asked Sep 19, 2023 at 8:51
puzzling.stackexchange.com
22
votes
White to move and mate in one
chess
asked Nov 3, 2024 at 7:38
puzzling.stackexchange.com
20
votes
Reducing π to zero (again)
mathematics
asked Sep 22, 2023 at 22:10
puzzling.stackexchange.com
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