**FOR SQUARE OF THE NO ENDNG WITH FOUR(4)

at first square the last digit of the given no and put it in the last and here the square becomes 16 so put 6 here and add 1 with first part

then in first put ((first part^2)*10+(first part*last part*2)).
then the first part becomes  ((first part^2)*10+(first part*last part*2)+1).
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EX:-
44^2= ((4^2)*10+(4*4*2)+1) 6=(160+32+1) 6=1936