Insight · ★★☆☆☆ · ~2 min
The Ball Triangle Flip
Ten balls point up. Three moves flip them down — most people try to move six.
by MindYourPuzzle
Ten balls are arranged in a triangle pointing up: one ball on top, then rows of 2, 3 and 4 beneath it.
Move exactly 3 balls so the triangle points down.
Describe which balls you'd move and where.
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