MATHEMATICAL KANGAROO 2018 | Dividing and counting pieces of paper

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Peru ALFRAM
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Alice has 3 white, 2 black and 2 grey pieces of paper. First she cuts every piece of paper that is not black into two pieces. Then she halves every piece of paper that is not white. How many pieces of paper does she obtain in total?
(A) 14 (B) 16 (C) 17 (D) 18 (E) 20



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