Question

find the greatest number of four digits which is a prefect square

Answer 1

argest no. of 4 digits is 9999

after finding square root of 9999

198is the remainder .

so,the largest no. of four digit which is a perfect square is 9999-198=9801is the perfect square of 99

(i hope this helps)

Answer 2

9801 is the four digit greatest number