How many holes does the opened sheet have? A square sheet is folded left onto right and then top onto bottom, and three holes are punched: one centred exactly on the corner where the two folds meet, one centred on the top folded edge, and one in the middle.

Question

Accepted Answer

7. The corner punch lies on both creases, so it opens into one round hole at the centre of the sheet: 1. The punch on the folded edge lies on one crease and opens into 2 holes. The middle punch goes through all 4 layers: 4. Total 1 + 2 + 4 = 7 .

How many holes does the opened sheet have? A square sheet is folded left onto right and then top onto bottom, and three holes are punched: one centred exactly on the corner where the two folds meet, one centred on the top folded edge, and one in the middle.

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