Eleven plus two equals one

If eleven plus two equals one, what does nine plus five equal?




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You are given 2 eggs.
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Now the question is how many drops you need to make. You are allowed to break 2 eggs in the process

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In 2007, a puzzle was released and $2 million prizes were offered for the first complete solution. The competition ended at noon on 31 December 2010, with no solution being found. Wiki