Question

Which of the following is a common multiple of 6 and 8?

• A. 12
• B. 36
• C. 24
• D. 54

Answer 1

The correct option is C 24

First 10 multiples of 6:
6 $\times$ 1 = 6
6 $\times$ 2 = 12
6 $\times$ 3 = 18
6 $\times$ 4 = 24
6 $\times$ 5 = 30
6 $\times$ 6 = 36
6 $\times$ 7 = 42
6 $\times$ 8 = 48
6 $\times$ 9 = 54
6 $\times$ 10 = 60

First 10 multiples of 8:
8 $\times$ 1 = 8
8 $\times$ 2 = 16
8 $\times$ 3 = 24
8 $\times$ 4 = 32
8 $\times$ 5 = 40
8 $\times$ 6 = 48
8 $\times$ 7 = 56
8 $\times$ 8 = 64
8 $\times$ 9 = 72
8 $\times$ 10 = 80

From the list of multiples of 6 and 8 we can see that, among the given options 24 is the only common mutiple.