Question

Which of following are co-prime (a) 39,91 (b) 161,192 (c) 385,462

Answer 1

Answer:

(b)161,192 are co-primes.

Step-by-step explanation:

factors of 39 are 3,13 and factors of 91 are1,91

hence they are not co-prime.

factors of 161 are 1,161 and factors of 192 are 1,2,3,4,6,8,12,16,24,32,48,64,96,192

their H.C.F is 1 .

hence they   are co-primes.

factors of 385 are1,5,7,11,35,55,77,385 and factors of 462 are 1,2,3,6,7,11,14,21,22,33,42,66,77,154,231,462

their common factors are   1,7,11,77

hence they are not co-primes

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