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Asked by unowen

The positive number X is divisible by 42, and is composed of only 1s and 0s when written in base 10. What's the smallest number that X might be?
8 years ago

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Answered by Steve
clearly, x must be a multiple of 5*42 = 210
I get 101010 = 42*2405 = 210*481
8 years ago
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The positive number X is divisible by 42, and is composed of only 1s and 0s when written in base 10. What's the smallest number that X might be?

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