Factors and Mulptiles

What is the HCF of 12 and 16?

• a) 4

• b) 6

• c) 8

• d) 12

What are the prime factors of 48?

• 2, 3, 4, 8

• 2, 3, 4, 6

• 2×2×2×2×3

• 2, 3, 4

Common factors of 18, 21 and 27 are

• 1

• 2

• 3

• 6

Which are the factors of 28?

• 14

• 20

• 28

• 6

• 8

Which one of the numbers below is prime numbers?

• 15

• 17

• 16

• 12

What are the first six multiples of 7?

• 14, 35, 21, 28, 42

• 7, 28, 42, 35, 63

• 7, 14, 28, 35, 42, 56

• 7, 14, 21, 28, 35, 42

What is the sixth multiples of 4?

• 12

• 18

• 16

• 24

4 is the prime factors of 12. True or false?

• True

• False

What are the factors of 24?

• 1, 2, 3, 4, 5, 6, 7, 8, 24

• 1, 3, 4, 6, 8, 10, 24

• 1, 2, 3, 4, 6, 8, 12, 24

• 1, 2, 4, 8, 12, 24

Prime factor of 45 is

• 1

• 5

• 9

• 15