The given expression (11.98 * 11.98 + 11.98 * x + 0.02 * 0.02) will be a perfect square for x equal to

Find the smallest perfect square number which is exactly divisible by 4, 5, 6, 15 and 18 :

The smallest perfect square number divisible by 12, 15, 18 is :

The least perfect square which is divisible by 3, 4, 5, 6, 8 is

Sum of digits of greatest five-digit perfect square?

If p is the difference between a number and its reciprocal and q is the difference between the square of the same number and the square of its reciprocal, then what is p⁴ + 4p² equal to ?