Question

How many odd prime numbers are there between 1 and 20?​

Answer 1

`8`

Explanation:

A prime number is a number that times it self and 1.

An odd number is a number that is not divisible by 2.

So our range is 1 - 20

What numbers are prime within this range:

2,3,5,7,11,13,15,17,19

`9`
`numbers`

Now which out of these are odd?

2,3,5,7,11,13,15,17,19

`8`
`numbers`