Product of two co-prime numbers is 117. Then their LCM is = ?

Pradeep Sikarwar • 9.01K Points
Tutor III Math

Q. Product of two co-prime numbers is 117. Then their LCM is = ?

(A) 117
(B) 9
(C) 13
(D) 39

Correct Answer - Option(A)

Explanation by: Pradeep Sikarwar

HCF of co-prime number is always 1
∴ Let number are = x & y respectively
Product of number = xy
xy = 117 (given)
∴ Product of number = LCM × HCF
⇒ LCM × 1 = 117
⇒ LCM = 117

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