SOLUTION: The difference between the sum of even numbers and the sum of odd numbers between 10 and 20 is

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Question 1033766: The difference between the sum of even numbers and the sum of odd numbers between 10 and 20 is
Answer by ikleyn(52798) About Me  (Show Source):
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The difference between the sum of even numbers and the sum of odd numbers between 10 and 20 is
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  10 +   12 +   14 +   16 +   18  +  20
 -
  11 +   13 +   15 +   17 +   19 
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 (-1) + (-1) + (-1) + (-1) + (-1) +  20  = -5 + 20 = 15.


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