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Question

Given that 784m is a multiple of 42
Find the smallest possible integer value of m
How to do?
Tks!
Ans : 3  

Answer

42 = 2 * 3 * 7

784 = 2 * 2 * 2 * 2 * 7 * 7

So n =3 to make 42 a factor of 784n

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