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number sequence

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rombald | 21:37 Wed 13th Oct 2010 | Quizzes & Puzzles
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Give the next number in the sequence.........3, 7, 19, 55, ?
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163? (differences 4, 12, 36, 108)
55 + 108 = 163
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Thanks to everyone - too late in the day to sort that one out - well done to you all.

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