Question

The smallest square number which is exactly divisible by each of the numbers $6,9$ and $15$, is _____________.

• A. $100$
• B. $400$
• C. $900$
• D. $1024$

Answer 1

The correct option is C $900$

Smallest number which is divisible $6,915$ is LCM of $6,9,15$

LCM od $6,9,15$ is $3\times 3\times 2\times 5$ $=90$

Since $90$ is not a square number so making is square, making number of zeros even.

Thus the number is $900$