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gauss approach using n/2

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1+3+5+7+...999 using n/2

Nov 26th, 2014

1+999=1000

Since there are only odd numbers, n=999/2

So n/2=999/4

Therefore the answer is

1000×999/4=249750

Nov 26th, 2014

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Nov 26th, 2014
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Nov 26th, 2014
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