Question

Q.2 If the G.C.D. of two numbers is 18 and L.C.M. is 90 then what is the sum of those
two numbers ?​

Answer 1

Answer:

108

Explanation:

Since GCD=18

LCM=90

Let the numbers be 18x and 18y

Hence LCM of 18x and 18y =18xy

hence 18xy=90 or xy=5

Now only factors of 5 are 1and 5

Hence numbers are 18 and 90

Hence sum =90+18=108