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Find the wrong number in the series: 3,10,29,66,125,218,3453, 10, 29, 66, 125, 218, 345

  1. 125125

  2. 6666

  3. 218218

  4. 345345

Show answer & explanation

Correct answer

125125

Explanation

Each term follows n3+2n^3+2 for n=1,2,3,n=1,2,3,\ldots. For n=5n=5, 53+2=1275^3+2=127, not 125125.

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