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posted by TRAY on Wednesday, August 29, 2012 at 6:53pm.

What is the sum of the first 70 consecutive odd numbers?

1 through 2*70 - 1 or 139 figure that out by experiment average = (1+139)/2 = 70 70 * 70 = 4900

By the way what we really did was : n[(n*2-1)+1 ]/2 which is n^2 or 70^2

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