Finding square ending with 5
For e.g. 35
The answer come in two parts:
LHS= the digit before 5 (i.e. 3 ) is multiplied by its next consecutive digit 4,
i.e. 3x4=12
RHS= as the number ends in 5, so
5 x 2=25
35 x 2= 1225.
Again lets say,
75 x 2= 7x8/5 x 2 = 5625