Answers

2014-05-22T13:37:45+05:30
Count the number of odd digits and find it's square......
it's simple!!!
1+3+5+7+9+11+13+15+17
there are 9 odd digits so ,this=9*9=81 ans.
0
if it would be 1+2+3+4........+9 then what?? ^
2014-05-22T13:57:37+05:30
Just use mind as calculator from right to left
0