Which number is a prime number?

A. 111

B. 121

C. 131

D. 141

I know for a fact that 121=11 times 11

hmm

to tell if a number is divisible by 3, add the digits and see if the sum is divisible by 3

well 111 is divisible by 3

141 is also divisible by 3

answer is C

A prime number is a number that have no divisors.

A. 111 have 3^37

B. 121 have 11^11

C. 131 have none

D. 141 have 3^47

So you can say that your answer is C. 131