13 मार्च 2017
If we square 11, it is very simple put 1(2*1)(12)get 121 same as square 12 put 1(2*2)(22) get 144 again for 13 we get 169 and for 14 we get 1 8 16=196 and so on.When we go deep, we find that there is symmetry of two types(2,4,6,8,10,12 ,14,16,18,20 …. Diff is always 2) &(
13 मार्च 2017