1. Which of the numbers below is NOT a prime
number?
A. 13
B. 37
C. 39
D. 47

C. 39

Step-by-step explanation:

Note:

A prime number is a number that is only divisible by 1 and itself.

13 is only divisible by 1 and itself.

37 is only divisible by 1 and itself.

47 is only divisible by 1 and itself.

But 39 is divisible by 1, 3, 13 and 39.

I hope it helps you. Please choose my answer as the BRAINLIEST.