How to make the perfect time table

By what least number 25 xx 20 xx 9 xx 12 xx 30 should be multiplied to make it a perfect square number?

what should be added to 2714 to make the sum a perfect cube?

What is least number added to 4042 to make it perfect square?

The least number to be multiplied with 9 to make it a perfect cube is _______________.

What least number must be added to 5607 to make the sum a perfect square ? Fnd this perfect square and its square root.

Find the least number by which 27 should be multiplied to make it a perfect square.