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Only if the first digit is five. Otherwise, the resulting number would be less than 10000.

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Q: A 4 digit number multiplied by 2 equals a five digit number using each number 1-9 only once?
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What 3 digit number multiplied by 1 digit equals a 4 digit number only using the numbers 1 - 8?

625×2=1250


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The biggest 4 digit number that can be made from using the digits of 850236, using a digit at most once, is 8653.


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