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5 November, 10:01

A broken calculator can double any number or permute its digits (but 0 cannot go up front). Can we start with number 1 and obtain 78 by a series of these operations

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  1. 5 November, 13:44
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    Answer: it's impossible to obtain 78

    Step-by-step explanation: Since the calculator can double any number or permute its digits except 0

    starting with number 1

    1, 2, 4, 8, 16, 32, 64, 128

    Therefore, it's impossible to obtain 78 by a series of these operations
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