Find the prime and composite numbers between 10 and 30?

Write the prime and composite numbers between 50 ad 70?

Write the prime numbers between 100 and 120.

What is the greatest prime number between 1 and 20?

Find the mean of prime numbers which are less than 30.

Getting a prime (or) composite

A bag contains some square cards. A prime number between 1 and 100 has been written on each card. Find the probability of getting a card that the sum of the digits of prime number written on it, is 8.

What is the smallest composite number?