Multiple & Factors Worksheet-2

Multiple & Factors Worksheet-2

11. Find the least common multiple of 15 and 20

A. 30                   B. 40                C. 60                   D. 80

12. Select the CORRECT statement.

A. A composite number is any number that has less than two factors.

B. A composite number has only two factors, one and itself.

C. A composite number is any number that has more than two factors.

D. A prime number is any number that has more than two factors.

13. The prime factors of 24 are ____.

A. 2×2×2×2        B. 2×2×2×5      C. 2×3×3           D. 2×2×2×3

14. Which of these is a prime number?

A. 19                    B. 18                  C. 21                    D. 22

15. Which list shows the factors of 28?

A. 1, 2, 3, 5, 12                               B. 7, 14, 21

C. 2, 7, 14, 18                                 D. 1, 2, 4, 7, 14, 28

16. Which option shows the least common multiple (LCM) of 15 and 30?

A. 30                    B. 60                  C. 15                    D. 90

17. Which option shows the least common multiple (LCM) of 12 and 18?

A. 24                    B. 54                   C. 90                   D. 36

18. Which list shows the factors of 24?

A. 1, 8, 12            B. 1, 7, 9             C. 1, 5, 12           D. 3, 5, 7

19. The LCM of 12 and 9 is ______.

A. 21                    B. 36                   C. 35                   D. 30

20. Newport Mall has a painting exhibition on every 4th day. Bell View Mall has a painting exhibition on every 5th day. On what day will both the malls have a painting exhibition?

A. on the 15th day                          B. on the 20th day

C. on the 10th day                         D. on the 9th day

Answer Key:

(11)-C; (12)-C; (13)-D; (14)-A; (15)-D; (16)-A; (17)-D; (18)-A; (19)-B; (20)-B