1. L.C.M of two numbers is 120 and their H.C.F. is 10. Which of the following can be the sum of those two numbers ?
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By: anil on 05 May 2019 01.41 am
L.C.M. = 120 and H.C.F. = 10 Let the numbers be $$10a , 10b$$ (where a,b are co prime) => $$10a imes 10b = 120 imes 10$$ => $$a imes b = 12$$ Since a,b are co primes, the only possibility is $$a = 3 , b = 4$$ (or vice-versa) => Numbers = 30 and 40 $$ herefore$$ Sum = 30 + 40 = 70
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