Find the LCM of the given numbers, i.e., 8, 12 and 15
LCM = 3 * 2 * 2 * 2 * 5 = 120
Now, we know that for a number to be a perfect square, the factors should in a pair.
In this case 2,3 and 5 are not in pair, so we need to multiply them with the LCM, i.e., 120
Therefore, the square number = 120 * 2 * 3 * 5 = 3600
