Quick Square

We can take a easy trick to find  a square for last digit 5.

Sometime we need to find square in a short time . then you use this process to find square.

In this process ,  multiply the 1st digit by itself +1 and put 25 on the end.

Suppose we find square of 25.

firstly multiply (2*2)=4+1=5

and now put 25 on the end .

so 

       25² = [(2*2)+1]25
           =525


Again we can find square 55
multiply (5*5)=25+2=26
and put 25 on the end.
so

    55²=[(5*5)+1]25

         =2625