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https://commons.wikimedia.org/wiki/File:All_5_free_tetrominoes.svg
Image: Wikimedia Commons

Will these 5 tetrominoes fit into a 5 × 4 rectangle?

SelectClick for Answer

https://commons.wikimedia.org/wiki/File:Tetrominoes_with_Checkerboard_Squares.svg

No. When colored like a checkerboard, the rectangle has an equal number of light and dark squares. So does each of the tetrominoes … with one exception. So the task is impossible.

April 5, 2021April 4, 2021 | Puzzles

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Futility Closet is a collection of entertaining curiosities in history, literature, language, art, philosophy, and mathematics, designed to help you waste time as enjoyably as possible.

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