Insight · ★★★☆☆ · ~7 min
Overlapping Coins
Non-overlapping coins on a table — can a scaled copy cover them all?
by MindYourPuzzle
100 unit-radius coins are placed on a table with no overlaps, and no more coins can be added. Using the same 100-coin configuration as a guide, prove you can cover the entire table with 400 coins.
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