Factors and Multiples(Study by Topics Junior Class Test) : GATE Academy

Welcome to your Factors and Multiples(Study by Topics Junior Class)

NAME

EMAIL

PHONE NUMBER

1.

A properly done factor rainbow will not show us all the factors of a number.

False

True

2. Which of the following correctly lists the factors of the number 28?

1,28

1,2,4,7,14,28

2,4,7,14

1,2,3,4,5

3. Which number below is a common factor of both 24 and 36?

5

12

7

9

4. What is the HCF of 24 and 36?

9

12

4

6

5. The lowest common multiple, or LCM, of 4 and 7 is 56

False

True

6. The numbers 20 and 30 have which of the following common factors

2,3,4,5,10

2,4,5,10

2,4,5,6,10

2,3,4,5,6,10

7. How many factors does a Prime number have?

1

2

3

4

8. What is the LCM of ab² and a²b³?

ab

a²b²

a²b

ab²

a²b³

9. Which two numbers are relatively prime?

9 and 16

21 and 56

18 and 27

30 and 45

10. All of the factors for the number 12 are: 1,2,3,4,6,12

True

False

11. Which number below is the highest common factor, or HCF, of the numbers 24 and 36?

5

3

6

12

12. Which is the greatest common factor of 45 and 60?

15

5

45

30

13. Which set of numbers are all Primes?

None of the above

63, 71, 43, 81

5, 23, 11, 37

33, 29, 41, 3

14. Find the LCM of 32 and 48

15. The factors of 36 include...

12, 15, 36

1, 6, 36

1, 13, 18

2, 4, 8

16. The highest common factor (HCF) of 10 and 20 is

4

10

5

2

17. 9 is a factor of...

1, 3 and 9

45 and 54

9 and 49

28 and 82

18. Find the HCF of 18a²y and 27x²y³.

6ax

6axy

2ay

9ax

9y

19. Find the LCM of 6ab and 5b².

30b²

36ab²

30ab²

3ab²

6ab

20. Which of the following is a prime number?

22

4

12

7