Math

solutions to the problem what four-digit whole number satisfies the following conditons? The sum of the digits is 6; the number is less than 1200; none of the four digits are equal; and the tens digit is an odd number.

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  1. Since the sum of all 4 digits is only 6, and all digits are different, the smallest combination of digits that can be used is
    1, 2, 3, 4

    but that sum is already 10

    There can be no such number.

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  2. however, using 0,1,2,3 the sum is 6
    tens is odd

    1032

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