PLAYING WITH NUMBERS

Which of the following is not a prime number?

• 31

• 7

• 61

• 91

Which of the following is a prime number?

• 33

• 81

• 93

• 97

The sum of first five prime numbers is?

• 11

• 18

• 26

• 28

The smallest three digit prime number is

• 101

• 103

• 109

• 113

How many prime numbers are less than 20?

• 9

• 8

• 11

• 7

Which of the following are twin primes?

• 11 and 13

• 19 and 23

• 1 and 3

• 7 and 11

The smallest even number is

• 2

• 4

• 1

• 0

The smallest odd number is

• 3

• 1

• 2

• 5