Odd Number Puzzle

Can you find the odd number in the following?

2716, 4135, 5321 and 7145




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Make a sentence consisting of three words that have the whole alphabet.

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I have one of the three numbers: 1, 2, or 3 in my mind. I speak only truth. You can ask me just one question for which I will only reply in yes or no or don't know. What question will you ask from me so that you are able to know the number?

I Speak only the Truth

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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