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These problems deal with sequences of numbers. Can you spot what the sequences' rules are?
1, 4, 3, 11, 15, 13, ?, ?, ?, ?, X, ...

The four integers after 13 are well defined, the 5th might be controversial.

Please comment.

(No Solution Yet, 0 Comments) Submitted on 2015-06-30 by Ady TZIDON   
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