question_answer

The least perfect square exactly divisible by each of the numbers 6,9,15 and 20 is

A) 3600                           

B) 900

C) 400                             

D) 225

Correct Answer: B

Solution :

\[\therefore \] \[\text{LCM}=3\times 5\times 2\times 3\times 2=180.\] The least multiple of 180 which is a perfect square is \[180\times 5=900.\]