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Posted by Carlee on Tuesday, January 11, 2011 at 2:35pm.

Compute the maximum number of intersections of 17 straight lines.

Please do not switch names -- as you've done for the last ten posts.

Lines....Intersections ..1...........0 ..2...........1 ..3...........3 ..4...........6 ..5..........10 or N = n(n - 1)/2

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