find the sum of all the numbers 1 to 1000
Answers were Sorted based on User's Feedback
Answer / sanjay chadha
Use the formula for sum n*(n+1)/2 thus
sum from 1 to 1000 = 1000 * (1000+1)
-------------- = 500500
2
| Is This Answer Correct ? | 124 Yes | 9 No |
Answer / nitesh
sum of n natural numbers = n(n+1)/2
so your answer is 500500
| Is This Answer Correct ? | 43 Yes | 4 No |
Answer / selvakumar.b
1000*(1000+1)/2=500500 This is a Correct Answer
| Is This Answer Correct ? | 37 Yes | 5 No |
Answer / prasad
The sum of 1 to 1000 is 500500..by prasad 9885536816
| Is This Answer Correct ? | 39 Yes | 12 No |
Answer / 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 |
Answer / zach
I use a different formula I made up that works for any set of consecutive numbers e.g. 21-639. Highest number is n, lowest number is x
------- (n+x)*(n/2)
--------(1+1000)*(1000/2)
--------(1001*500
| Is This Answer Correct ? | 11 Yes | 3 No |
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