1) Which of the following is a pair of co-primes ? A) (16, 62) B) (18, 25) C) (21, 35) D) (28, 92) Answer: Option BExplanation:Two numbers are said to be co-prime if their H.C.F. is 1. from the given options H.C.F. of 18 and 25 is 1. So, they are co-primes.
