Factors & Multiples Worksheet-4

Factors & Multiples Worksheet-4

11. The greatest prime number less than 100 is:

A. 97                   B. 99                   C. 93                   D. 100

12. LCM of 6, 12 and 18 is:

A. 18                             B. 36                   C. 24                   D. 72

13. The prime number just before 7 is:

A. 7                      B. 1                      C. 2                     D. 5

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14. The LCM of 1 and 2 is:

A. 1                      B. 2                     C. 0                     D. None

15. The prime factors of 24 are:

A. 2×3×4            B. 2×2×2×3       C. 6×4                 D. 8×3

16. Find a number which is a multiple of all the numbers from 1 to 10?

A. 5040              B. 1260               C. 720                 D. 1440

17. Observe the following sums. Then find the sum of 1 + 3 + 5 +7 + 9 + …..+19?

A. 121                  B. 81                             C. 100                 D. 64

18. The number 24 has_____

A. 2 factors        B. 4 factors        C. 6 factors        D. 8 factors

19. Write the least 2-digit number that has 2, 5 and 8 as factors?

A. 80                   B. 40                   C. 16                    D. 10

20. Find the missing digit if it has 11 and 13 as factors.

A. 2                     B. 4                     C. 6                     D. 8

Answer Keys

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