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math puzzle

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one number is wrong in the bellow series

5, 27, 61, 122, 213, 340, 509

 

Please help me to solve the problem.

If you think hard enough, there's at least two answers to this puzzle.

What kind of math course did this come from?

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If you think hard enough, there's at least two answers to this puzzle.

What kind of math course did this come from?

 

This is from the question of SSC multitasking exam.

You can google

 

5, 27, 61, 122, 213, 340, 509

 

as I did to get the answer mostly likely required by the exam.

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