at first square the last digit of the given no and put it in the last
then in first put ((first part^2)*10+(first part*last part*2)).
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EX:-
11^2=((1^2)*10+(1*1*2)) 1^2 = (10+2) 1=121
131^2=((13^2)*10+(13*1*2)) 1^2=(1690+26) 1= 17161
22^2= ((2^2)*10+(2*2*2)) 2^2=(40+8) 4=484
33^2=((3^2)*10+(3*3*2)) 3^2=(90+18) 9=1089
then in first put ((first part^2)*10+(first part*last part*2)).
...............................................................................
EX:-
11^2=((1^2)*10+(1*1*2)) 1^2 = (10+2) 1=121
131^2=((13^2)*10+(13*1*2)) 1^2=(1690+26) 1= 17161
22^2= ((2^2)*10+(2*2*2)) 2^2=(40+8) 4=484
33^2=((3^2)*10+(3*3*2)) 3^2=(90+18) 9=1089
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