Vedic Maths - One More than the one before

There is a simple way of squaring numbers that end in 5.
75^2 (75 squared) . We multiply 7(the number before the 5) by the next number up which is 8 = 56. This is the first part of the answer. Then we simply multiply 5 X 5 which is the second part of the answer, which is 25. So the final result is 5625.
Imagine you can do this in your head.
65 ^2 = 6 X 7 = 4225
Try this one for yourself :-
25 ^ 2 =