Find the greatest no of 6 digits which is a perfect square

Find the greatest number of 5 digits which is a perfect square.

Find the greatest number of 4 digits which is a perfect square.

Find the least number of 4 digits which is a perfect square.

Find the greatest number of two digits which is a perfect square.

Find the greatest number of six digits which is a perfect square.

Find the greatest number of five digits which is a perfect square.

Find the greatest 4 -digit number which is a perfect square.

Find the greatest number of five digits which is a perfect square. Also find the square root of the number of obtained.

Find the least number that must be subtracted from 5607 so as to get a perfect square.Also find the square root of the perfect square.find the greatest 4 digit number which is a perfect square.