Q.10 Find the LCM of the following numbers:
(a) 9 and 4
(b) 12 and 5
(c) 6 and 5
(d) 15 and 4
Observe a common property in the obtained ’ LCMs. Is LCM the product of two numbers in each case?

(a) 9 and 4
It is co prime number then LCM = product of the number
LCM = 9 × 4 = 36
(b) 12 and 5
LCM = 12 × 5 = 60
(c) 6 and 5
LCM = 6 × 5 = 30
(d) 15 and 4
LCM = 15 × 4 = 60
Yes in each case the LCM of given numbers is the product of these numbers.