Prime factors test questions - WJEC

1

What are the prime factors of 42?

3 × 14

2 × 3 × 7

2 × 21

2

What are the prime factors of 150?

2 × 3 × 5 × 5

3 × 3 × 5 × 5

6 × 25

3

What is the LCM of 13 and 3?

13

3

39

4

What is the HCF of 32 and 24?

2

8

4

5

What is the LCM of 24 and 36?

12

72

30

6

What is the HCF of 104 and 136?

8

12

13

7

What is the HCF of 3 × 13 and 2² × 13?

9

17

13

8

What is the LCM of 2² × 3² × 5 and 2³ × 3 × 5?

360

5,590,200

30

9

What is the HCF of 2 × 5 × 13 and 2² × 13?

13

26

52

10

Find the LCM of 3² × 11 × 13 and 3 × 11²?

1287

14,157

429