Aptitude Trick#3 (Square of three digit number)

Square of three digit number

Consider An Example

Example: Square of 206

• Step 1:

           we separate the number into
            two parts(a & b)

• Step 2: Now using formulae

                 a２| 2ab | b２

                we get 20*20 | 2*20*6 | 6*6

Answer = 42436