Question

Alexis said, "All prime numbers except for the number 2are odd. So all odd numbers must be prime numbers."
Do you agree with Alexis? Explain

Answer 1

Alexis is incorrect.
Just because a number is odd does not mean that it is prime.

For example, one of these lowest odd numbers that isn't prime is 9.
You can get 9 by multiplying 3 by 3.
3 × 3 = 9

Another example is 15.
5 × 3 = 15

Even the number 1 isn't prime.
1 × 1 = 1