Find the least number which must be added to each of the following numbers so as to get a perfect square. Also find the square root of the perfect square so obtained.

**(i)** 525

**(ii)** 1750

**(iii)** 252

**(iv)** 1825

**(v)** 6412

**(i)** 525

**(ii)** 1750

**(iii)** 252

**(iv)** 1825

**(v)** 6412