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December 20, 2014

December 20, 2014

Posted by **ciera** on Tuesday, January 23, 2007 at 9:55pm.

Try it yourself. You'll be surprised that it won't take very long to add up to 1,000.

To find the sum of the numbers from 1 to "n":

(1+n)(n/2)=sum

1001=(n^2+1)/2

2002=n^2+1

2001=n^2

n=44.7.....

So, 45 is the last number she would add.

- math -
**jasmin**, Thursday, October 11, 2012 at 8:35pm995

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