You can put this solution on YOUR website! Let the number be x.
Then the other number is (x+6).
The difference between their squares is 192
(x+6)^2-x^2=192
Expanding we get,
x^2+12x+36-x^2=192
12x+36=192
12x=156
x=13
The numbers are 13 and 19 respectively.