Question

Which number is prime?


A.
51


B.
57


C.
59


D.
63

Answer 1

which number only has factors of 1 and itself?

Answer 2

A.?

Answer 3

a number like 12 is not prime because it has factors of 3 and 4 (3*4 = 12)

but a number like 19 is prime since it only has the factors 1, 19

Answer 4

51 is not prime (17*3 = 51)

Answer 5

Prime Number - Can only be divided by 1 and itself, and is GREATER THAN 1.

Go here for further reference:
http://www.mathsisfun.com/prime_numbers.html

Answer 6

I'd say C.