1. ## Number Pattern sum

What is the value of 1-2+3-4+5-6+..............-2004+2005-2006+2007?

2. Originally Posted by Dragon
What is the value of 1-2+3-4+5-6+..............-2004+2005-2006+2007?
3010

3. Originally Posted by OReilly
3010
how did u get that and i dont think that is right

4. Originally Posted by Dragon
how did u get that and i dont think that is right
It's not right.
It was just a test to see if you are going to accept that value blindfully.

Correct result is 1-2+3-4+5-6+..............-2004+2005-2006+2007=-1003+2007=1004