Problem 24 · 2010 Math Kangaroo
Hard
Spatial & Visual Reasoning
foldingpaper-cutting
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Answer: D
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Hint 1 of 2
Folding in the middle three times makes 8 equal sections and 7 creases.
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Hint 2 of 2
Real folds alternate up and down in a fixed pattern — spot the picture that breaks it.
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Approach: check the crease up/down pattern
- Folding three times in the middle yields a definite alternating sequence of mountain and valley creases across the 7 folds.
- Four of the pictures match a genuine fold sequence; option D shows a crease pattern that cannot arise.
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