Question

How many prime numbers are there between $1$ and $20$?

• A. $7$
• B. $8$
• C. $9$
• D. $10$

Answer 1

The correct option is B

$8$

Explanation for correct option

Option B: $8$

Prime Numbers: The numbers which have only two factors, $1$ and itself are called Prime Numbers

For e.g. $2,3,5,7,11,13,17,19,23,29$ etc

The prime numbers between $1$ and $20$ are $2,3,5,7,11,13,17,19$.

Therefore, the number of prime numbers between $1$ and $20$ is $8$.

Hence, option B is the correct answer.