perplexus.info :: Just Math : Coin fitting

Coin fitting (Posted on 2025-04-23)

Coins of diameter 1 have been placed in a square of side 11, without overlapping or protruding from the square. Can there be 126 coins? and 127? and 128?

No Solution Yet Submitted by Danish Ahmed Khan

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A useful resource

| Comment 4 of 5 |

WolframAlpha has an app for this, type 'geometric packing in 2d'

128 is apparently the 'densest known' for the 11 square.

Posted by broll on 2025-04-23 10:34:18

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