Question

A General can draw up his soldiers in the rows of $10,15$ and $18$ soldiers and he also draws them up in the form of a solid square Find the least number of soldiers with the general

• A. $100$
• B. $3600$
• C. $900$
• D. $90$

Answer 1

The correct option is C $900$

$LCMof(10,15,18)=2\times 3\times 5\times 3=90$
To make it perfect square, we multiply it with $2\times 5=10$
$\therefore requirednumberofsoldiers90\times 10=900$