Question

68 square minus 32 square

Answer 1

it will be 3600

68*68   -   32*32
=4624  -   = 1024
=3600
hence proved
 it can be the square of 60

Answer 2

the answer is 3600. sol=.68 square =4624;32 square= 1024...4624-1024=3600i.e. 60 square