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Mathematics 17 Online
OpenStudy (sepeario):

Consecutive odd numbers starting at 1 are added together. Their sum is 400. How many numbers were added?

OpenStudy (anonymous):

The sum of the first n odd numbers is determined by \[n ^{2}\] Therefore, if the sum is \[[400 = n^{2}] \] n = 20 20 numbers were added

OpenStudy (sepeario):

Thanks @theanonymous27

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