Question

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 ?
A) 140
B) 80
C) 60
D) 70

Answer 1

Given:
Let 10a and 10b be the two numbers where a and be are coprimes.
LCM OF TWO NUMBERS= 120
HCF= 10
LCM =10 ab = 120
ab =12
Therefore possible pairs could be :
(3,4) or ( 1,12)
Hence numbers can be 30 and 40 and their sum is 70.
Hence option d is correct.

Answer 2

Answer:

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