Question

Find the smallest square number, which is
divisible by each of the numbers 9, 15 and 20.​

Answer 1

Step-by-step explanation:

30

Therefore, 30 is the smallest square number that is equally divisible by 9,15 and 20

Answer 2

The LCM of 9, 15, 20 is 180. So the least number divisible by 9, 15, 20 is their LCM ,i.e. 180

Now, 180 = 3² × 5 × 4

Thus, 180×20= 3²×5²×4².

Hence, the required least number is 180× 20= 3600