Coin Triangle


by Serhiy Grabarchuk

Home / Puzzles in Education / Hands On Puzzles / Grade 4 /

Arrange nine identical coins into the right triangle shown in the illustration.

Change the triangle into a square by moving the minimum of the coins.

How many coins will you need to move to do this?

To play the interactive version of the puzzle, please, visit it

Posted: December 14, 2007
PDF Version (49 KB)

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