Insight · ★★★☆☆ · ~6 min
Catching Ants (Pigeonhole in 2D)
51 ants on a 1×1 table — must two always be close? Pigeonhole says…
by MindYourPuzzle
51 ants sit on a 1×1 square table. You have a 1/5 × 1/5 square card.
Can you always position the card to cover at least 3 ants?
Hints