The product of two coprime numbers is 117, then their LCM is

(a) 9

(b) 13

(c) 39

(d) 117

Solution:

117 = 13×9

Co-prime numbers are the numbers whose common factor is only 1.

HCF of co-prime numbers is always 1.

HCF×LCM = product of 2 numbers

1×LCM = 117

LCM = 117

Hence option d is the answer.

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