answersLogoWhite

0


Best Answer

To work it out for yourself, you need to understand that a prime number is a number than can only be divided by 1 and itself.

18 can be divided by 2

39 can be divided by 3

42 can be divided by 2

which leaves 31 which can only be divided by 1 and 31.

User Avatar

Wiki User

10y ago
This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: Which is a prime number18 31 39 42?
Write your answer...
Submit
Still have questions?
magnify glass
imp