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

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

A number is decreased by 9. If the obtained number is multiplied by 7, it gives 21. Find the number.

A number when multiplied by 5 gives by 80 what is that number?

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

A number when multiplied by 4 in increased by 54. The number is

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 five times of itself gives the value equal to 720. What is the number?

Half more than a rational number multiplied by 7 gives (17)/(2) .Find the rational number