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Common Answers

Have you entered August's Common Answers?

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Puzzle - Answer

What number comes next in this sequence:

12 13 15 17 111 113 117 119 123 ==?==

 [Ref: ZBLZ] © Kevin Stone

Answer: 129.

These are the first 10 prime numbers (2, 3, 5...) prefixed with a 1.

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