Question

Find the smallest perfect square divisible by 3,4,5 and 6.

Answer 1

L.C.M of $3,4,5,6=2\times 2\times 3\times 5=60$

In which 3 and 5 are not in pairs
L.C.M $=2\times 3\times 2\times 5=60$
$\therefore$ We should multiple it by $3\times 5$ i.e by 15
$\therefore$ Required perfect square = $60\times 15=900$