Problem 23 · 2025 Math Kangaroo
Stretch
Spatial & Visual Reasoning
paper-cuttingfolding
Nele folds a piece of paper in half and then in half again (see picture). She cuts four pieces out of the folded paper. When she unfolds it, she sees the pattern shown. What did the paper look like before she unfolded it?
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Answer: A
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Hint 1 of 2
Fold the unfolded pattern back in half twice and see what single quarter-piece you get.
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Hint 2 of 2
The folded paper shows just one quarter of the pattern, with cuts on the folded edges.
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Approach: fold the pattern back to a quarter
- Folding in half twice stacks the paper into four layers, so the cuts repeat four times.
- Reverse it: take one quarter of the shown pattern.
- That single folded quarter is the X-shape in option A.
- So before unfolding it looked like A.
Mark:
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