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What is the sum of all the odd consecutive numbers b/n 460

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What is the sum of all the odd consecutive numbers b/n 460 [#permalink] New post 24 Sep 2006, 09:35
What is the sum of all the odd consecutive numbers b/n 460 and 600?

If you're like me, numer property questions, similar to the one above, always seem to break you in half. On my personal quest to demistify and attack these question-types, here's a link that has helped me considerably.

If it helps you, don't thank me...let's just say we're in this together.

http://mathforum.org/k12/mathtips/addco ... tween.html

The answer is 37100 by the way. :lol:
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 [#permalink] New post 24 Sep 2006, 12:53
THe formula for Sum of an AP is

n/2 [2a + (n-1)d]

= 70/2 [ first + last]
= 35 [1060]
= 37100
  [#permalink] 24 Sep 2006, 12:53
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What is the sum of all the odd consecutive numbers b/n 460

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