Question

Explain why 186,426 Is diviable by both 3 and 9

Answer 1

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A number is divisible by 9 if the sum of its digits is divisible by 9.

Look :

`(1 + 8 + 6 + 4 + 2 + 6)/(9) = (27)/(9) = 3 \\`

Thus 186,426 is divisible by 9 .

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Also a number is divisible by 3 if the sum of its digits is divisible by 3.

Look :

`(1 + 8 + 6 + 4 + 2 + 6)/(3) = (27)/(3) = 9 \\`

Thus 186,426 is divisible by 3 .

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