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Cora has exactly four wooden toy blocks with digits on them. Two of the blocks have the digit one of the blocks has the digit and one of the blocks has the digit How many distinct positive integers can she form using one or more of the blocks, without using each block more than once? It is not 10 or 3

 Jul 19, 2022
 #5
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why isn't it three

 Jul 19, 2022
edited by nerdiest  Jul 19, 2022

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