The first common multiple of 6 and 9 is ___.

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Worked solution

1. List the first few multiples of 6 and 9

Multiples of $6$ : $6, 12, 18, 24, \dots$
Multiples of $9$ : $9, 18, 27, \dots$

2. Identify the first common multiple

The smallest number that appears in both lists is $18$ .

Answer

$18$ (option 2)

AI analysis — may contain mistakes.

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