Which of the following is a pair of co-primes?
(18,25)
Given numbers are 18 and 25
For pairs to be co-primes there should be no common factor except 1
Factorization of 18 and 25 are
Factors of 32 = 2 × 3 × 3
Factors of 62 = 5 × 5
Therefore, there is no common factor. So, (18,25) is co-prime.
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