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A woman labels the squares of a very large chessboard 1 through 64. On each square k, the woman puts 2^k grains of rice. How many more grains of rice are placed on the 10th square than on the first 9 squares combined?

 Jun 10, 2021
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2^10=1024

2+4+8+16+32+64+128+256+512=1022

1024-1022=2

 Jun 10, 2021

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