MATHEMATICAL KANGAROO 2017 | Counting the least quantity of stickers

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Peru ALFRAM
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Lisa has several sheets of construction paper like
this and .
She wants to make 7 identical crowns:
For that she cuts out the necessary parts.
What is the minimum number of sheets of construction paper that she has to cut up?
(A) 7 (B) 9 (C) 10 (D) 11 (E) 13



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