If a, b, c, are positive integers such that abc = 210, find the minimum value of a + b + c.
I think it's 18
The factors of 210 are 1, 2, 3, 5, 6, 7, 10, 14, 15, 21, 30, 35, 42, 70, 105 and 210.
check answer
5 x 6 x 7 = 210
5 + 6 + 7 = 18
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