Odd Number Puzzle

Can you find the odd number in the following?

2716, 4135, 5321 and 7145




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Find three numbers such that

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* The difference between the second and the first number is equal to the third and second.

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Solve the puzzle by telling what does below picture means.

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A man had five children. He had $100 with him to give to his children. He decided to start with the youngest child and then give $2 more than each younger child to his next elder child.

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Tough, 'I'm staying.'

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Tough, 'Let's get going.'

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How many letters are in the alphabet?

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Amazing Facts

No Solution

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