Question

Write all the prime numbers between $1$ to $20$.

Answer 1

Prime numbers between $1$ to $20$ :

Prime numbers are the natural number having only two factors, one and the number itself.

Now, prime numbers between $1$ to $20$ are,

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

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