What number when multiplied by itself will become 83.7225

If a number when multiplied by 25% of itself gives a number which is 200% more than the number, then the number is

An odd number when multiplied by itself gives 2401 find the number

What are the whole numbers which when multiplied with itself gives the same number?

What are the whole numbers which when multiplied with itself gives the same number?

A number when multiplied by 4, exceeds itself by 45. find the number.

A number when multiplied by five times of itself gives the value equal to 720. What is the number?