find the sum of all the numbers 1 to 1000
Answer Posted / booba
For each number between 1 and 499 there is a corresponding
number between 501 and 999 which, when added together,
equals 1000.
For example:
1 + 999 = 1000
2 + 998 = 1000
...
499 + 501 = 1000
Now, there are 499 pairs like that. Add them together and
you get 499,000
Add to that 1000 and 500, and you get 500,500, which is your
total.
Is This Answer Correct ? | 24 Yes | 3 No |
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