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Using all the digits from 1 to 5 once only, make two numbers which multiplied together give the largest number possible?

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Using all the digits from 1 to 5 once only, make two numbers which multiplied together give the largest number possible?
posted Feb 8 by anonymous

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1 Answer

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If we are using a fixed number of digits to make 2 numbers that when multiplied with one another gives us the max product, then the 2 numbers should have same number of digits or something closer. Ie. In case of 1, 2, 3, 4, & 5 we must have one 2 digit number and one 3 digit number since we cant have 2, 2 or 3, 3 digit numbers here.
It can be found that 52 × 431 = 22412 is the greatest product.

answer Feb 8 by Tejas Naik
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