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Which of the following shows the first three common multiples of 3 and 9?

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3, 6, and 9

9, 18, and 27

6, 12, and 18

1, 3, and 9

answer is B.

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Detailed Solution

A Multiple of a number is a number that is a product of the number with any natural number.

Multiples of 3 = 3, 6, 9, 12, 15, 18, 21, 27, 30, …….

Multiples of 9 = 9, 18, 27, 36, 45, 54, …….

Common multiples of 3 and 9 = 9, 18, 27,36, 45 ...

Hence, we can say that the first common multiples of 3 and 9 are 9, 18, and 27.

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