SOLUTION: Find the sum of the odd integers between 21 and 61 inclusive

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Question 1001481: Find the sum of the odd integers between 21 and 61 inclusive
Answer by Alan3354(69443) About Me  (Show Source):
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Find the sum of the odd integers between 21 and 61 inclusive
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21 to 61 is 41 integers.
21 of them are odd.
41 is the center integer.
The other 10 make 10 pairs, the some of each pair is 82
eg 21 + 61
23 + 59
etc.
--> 82*10 + 41
= 861