Question

8. Find the least perfect square number which is
exactly divisible by 6, 18 and 30 with method .
​

Answer 1

LCM of 6,18,30 = 90

90 = 2 × 3 × 3 × 5

as 2 and 5 are not in pair

then,

we will multiply it by 10 i.e. 2 × 5

90 × 10 = 900

900 is the smallest perfect square divisible by 6, 18 , 30