A long ribbon is folded in half from left to right three times in a row, until it is eight layers thick. A round and a square hole are punched near its end. Which figure shows the ribbon opened?

Question

Accepted Answer

(a). Undo the folds one at a time; each undoing mirrors every hole across that crease. The holes end up in mirror pairs about every crease, so the round and square holes do not repeat at even steps: (a).

A long ribbon is folded in half from left to right three times in a row, until it is eight layers thick. A round and a square hole are punched near its end. Which figure shows the ribbon opened?

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