Monday, January 3, 2011

SQUARE

Find the Square of that number in which last digits are 25

425 x 425

                                180                  625
                             4x4=16                fix   
                             4/2 =2
                             16+2=18x10
                                              fix
          Steps :
Step 1 : 625 at end is fix.
Step 2 : Square of 4 = 16
Step 3 : Half of 4      = 2     
Step 4 : Sum of 16 + 2 = 18
Step 5 : Multiply 18 by 10 = 180 and 10 is Fix.
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