Question

Find the number of prime numbers between $20$ and $40$, both inclusive.

• A. Three
• B. Four
• C. Five
• D. Six
• E. Seven

Answer 1

The correct option is B Four

A number that is divisible by itself or $1$ is called prime number.

Prime number between $20$ and $40$ are $23,29,31,37$.

Then there are $4$ prime number between $20$ and $40$.