A square sheet is folded once vertically and once horizontally. One hole is punched through the folded sheet, away from the folded edges. How many holes appear when it is fully unfolded?
- A.2
- B.3
- C.4 ✓
- D.8
Explanation: Two folds create 4 layers, so one punch through all layers becomes 4 holes when unfolded, arranged symmetrically.
Class 6 IMO Mathematics Olympiad practice · Visual & Spatial Reasoning · Mirror Images, Folding & Cubes
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