Question

Which of the following is not a multiple of 6?

• A. 18
• B. 30
• C. 45
• D. 54

Answer 1

The correct option is C 45

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
Here, we can clearly see that 45 is not a multiple of 6.