SSC CGL 2013 Tier 1

Question 105

Product of two coprime numbers is 117. Then their LCM is

Solution

Let the two numbers be a,b.
Hence a * b = L.C.M(a,b) * G.C.D(a,b)
It is given that a,b are co-primes, implies G.C.D(a,b) = 1
Hence from the above equation we get L.C.M(a,b) = a*b = 117

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