Question

find the greatest number of 2 digits which is a perfect square

Answer 1

Largest 2 digit number is 99So we will find the square root of 99Now whatever number which is remaining at thelast we will subtract it from 9918 is remaining at the last so when we subtract it from 99 Our answer will come 81So the largest 2 digit number which is a perfect square is 81
source:_brainly.com

Answer 2

1^2= 1
2^2=4
3^2=9
4^2=16
..........
8^2=64
9^2= 81..
10^2 =100(3 digit perfect square)..

81 is a 2 digit perfect square..

hope it helps....