Answer :
by taking L.C.M of 15 & 18 we will get 90.
so 90 is the smallest number that is divisible by 15 and 18
so 90 is the smallest number that is divisible by 15 and 18
15 = 3 * 5 by splitting the number in to product of prime numbers
18 = 3 * 3 * 2
least common multiple = LCM = 3 * 5 * 3 * 2 = 90
18 = 3 * 3 * 2
least common multiple = LCM = 3 * 5 * 3 * 2 = 90