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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