#### Answer

6

#### Work Step by Step

Multiples of 6: 6, 12, 18, 24, 30
In order to find the LCM of 3 and 6, we must find the first multiple of 6 that is also divisible by 3.
$6\div3=2$
Therefore, 6 is the LCM of 3 and 6. This makes sense, given that 6 is a multiple of 3.