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[QUOTE]Originally posted by PCola77: [QB] LOL. I just started writing how I couldn't figure out #3, and in writing it, I figured it out... the grouping is 5 numbers. First and last decrease by 3 each time, middle 3 increase by 3 each time. [b]20 3 6 9 17[/b] 14 12 15 18 ?[b]?[/b] So 1st and 5th numbers go 20, 17, 14, 11, 8, 5, 2... 2nd 3rd, and 4th go 3, 6, 9, 12, 15, 18, 21, 24, 27... put them together and you get: 20, 3, 6, 9, 17...14, 12, 15, 18, 11...8, 21, 24, 27, 5...2, 30, 33, 36, -1... [/QB][/QUOTE]
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