Vinay Sharma and H K Thakur Solutions for Chapter: Playing With Numbers, Exercise 2: SELF PRACTICE 3.2

List all prime numbers less than $100$ and having $3$ as the digit at its unit place.

Write down the smallest odd composite number.

Write down the smallest even composite number.

Write down the smallest even prime number in figures.

$1$ is the smallest prime number.

 If a number is a prime, it must be odd.
 

The sum of two prime numbers is always a prime number.
 

If two numbers are co-prime, at least one of them must be prime number.