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

Find the least number of four digits which is perfect square. What is the square root of this number ?

The least number of four digits which is a perfect square is :

Find the largest number of 2 digits which is a perfect square. Find the largest number of 3 digits which is a perfect square.

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

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

Find the least number of six digits which is a perfect square. Find the square root of this number.

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

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

Find the greatest number of two digits 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.