Question

What would you assume at the beginning of an indirect proof for the following?

A number that is divisible only by itself and 1 is a prime number. 51 is not a prime number.

A. 51 is a prime number.
B. 51 is not a prime number.
C. Prime numbers are not divisible by themselves and 1.
D. 51 is not divisible by itself and 1.

Answer 1

I would assume that it is not a prime number as it seems to be divisible by 3.