Which pair of numbers is relatively prime?

a. 7 and 42

b. 16 and 39

c. 66 and 77

d. 90 and 891

Question

Mathematics

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26 November, 06:18

Which pair of numbers is relatively prime?

a. 7 and 42

b. 16 and 39

c. 66 and 77

d. 90 and 891

+3

Answers (1)

Know the Answer?

Dana Gillespie · Answer 1

Two numbers are relatively prime if they have no factors in common. In other words, if their greatest common divisor is 1.

7 and 42 - both divisible by 7

66 and 77 - both divisible by 11

90 and 891 - both divisible by 9

Answer would be 16 and 39

Which pair of numbers is relatively prime?a. 7 and 42b. 16 and 39c. 66 and 77d. 90 and 891

Which pair of numbers is relatively prime?

a. 7 and 42

b. 16 and 39

c. 66 and 77

d. 90 and 891