SOLUTION: Find sum of the odd integers from 7 to 117 inclusive

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Question 466171: Find sum of the odd integers from 7 to 117 inclusive
Answer by robertb(5830) About Me  (Show Source):
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We have to find n, the number of odd integers from 7 to 117.
==> 117 = 7 + (n-1)2 ==> 110 = (n-1)2 ==> 55 = n-1 ==> n = 56.
==> S%5B56%5D+=+%2856%2F2%29%2A%287+%2B+117%29+=+28%2A124+=+3472