Which of the following is not a prime number ?

• 23

• 29

• 97

• 87

Which of the following is not a factor of 102?

• 2

• 51

• 4

• 1

Which is the smallest odd prime number?

• 1

• 2

• 3

• 9

How many even prime numbers are there ?

• 0

• 1

• 2

• 3

80 is divisible by 4 and 5. Therefore, it is also divisible by ___

• 5-4 = 1

• 5 +4 = 9

• 5 x 4 = 20

• 0

35 and 25 both are divisible by 5. Is their difference also divisible by 5?

• True

• False

27 is divisible by 9, therefore it is also divisible by _______.

• 1 and 9

• 3 and 9

• 1, 3 and 9

• 13 and 9

The prime factorization of 16 will be _____.

• 2 x 2 x 2 x 2

• 2 x 4 x 2

• 8 x 2

• 1 x 16

The prime factorization of 28 will be _____.

• 4 x 7

• 2 x 2 x 7

• 2 x 14

• 28 x 1

The prime factorization of 12 will be _____

• 1 x 12

• 2 x 6

• 2 x 2 x 3

• 3 x 4