Posted by: ratobhaley December 20, 2007
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Parbatya good try but its pretty lenghty. Easy way to do it is as follows
Pair up the 1st number with the last number ie 1 and 50 which adds up to 51
Pair up 2nd and second from last ie 2 and 49 which adds up to 51
There are 25 such pairs from 1 to 50 so you multiply 51 times 25 to get your answer.
In one step its 25 x 51 = 1275
Thanks for playing.