Question

Which pairs of numbers are co-primeRequired to answer. Single choice.

11,30

22,24​

Answer 1

Answer:

If the H.C.F of two numbers are 1 they are said to be co-prime

Factors of 14=1,2,7

Factors of 35=1,5,7

⇒ Common factor =1,7

∴ (14,35) is not pair of co-prime.

Factors of 18=1,2,3,6,9

Factors of 25=1,5

⇒ Common factor =1

∴ (18,25) is pair of co-prime.

Factors of 31=1,31

Factors of 93=1,3,31

⇒ Common factor =1,31

∴ (31,93) is not pair of co-prime.

Factors of 32=1,2,4,8,16

Factors of 62=1,2,31

⇒ Common factor =1,2

∴ (32,62) is not pair of co-prime.