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UKMT Grey Kangaroo, 2019

Combinatorics Difficulty 2.0 Junior Find the answer United Kingdom

Cathie folded a square sheet of paper in half twice and then cut it through the middle twice, as shown in the diagram, before unfolding it all. How many of the pieces that she obtained were squares?

(A) $3$ (B) $4$ (C) $5$ (D) $6$ (E) $8$

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