Question

Number of prime number from $1$ to $50$ are ______.

• A. $18$
• B. $12$
• C. $15$
• D. $20$

Answer 1

The correct option is C $15$

Prime numbers are those which has only two factors, One and the number itself.

$Note:$ One is neither prime nor composite.

Prime No. from $1$ to $50$ are:

$2,3,5,7,11,13,17,19,23,29,31,37,41,43,47$

Thus in total $15$.