Which is not a prime number 19,29,39

Question

Beckham Brown

Social Studies

18 April, 06:08

Which is not a prime number 19,29,39

+1

Answers (2)

Know the Answer?

Delilah · Answer 1

The composite # is 39

Lillian Salazar · Answer 2

Prime numbers are numbers that are only divisible by 1 and themselves. So, to tell if a number is prime, look at its factors.

19:

1 x 19

29:

1 x 29

39:

1 x 39

3 x 13

So, because 39 has more than one set of factors, it's NOT a prime number.