If a positive integer n is divisible by both 5 and 7, the n must also be divisible by which of the following
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If a positive integer n is divisible by both 5&7
then n is divisible by 35
verify:
5×7=35
7×5=35
35×1=35
then n is divisible by 35
verify:
5×7=35
7×5=35
35×1=35
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