Question

find the greatest number of 4 digit which is a perfect square​

Answer 1

9999 is largest 4 digit number, and 100^2 is 10000, or 1 greater than the largest 4 digit number. This means that the closest square root of the largest perfect square is most likely 99. So 99^2 (9801)is the largest perfect square of four digits.

Answer 2

Answer:

9999 is a greatest number which is perfect square