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Find the wrong number in the series: 7,8,18,57,230,1165,69967, 8, 18, 57, 230, 1165, 6996

  1. 230230

  2. 1818

  3. 11651165

  4. 69966996

Show answer & explanation

Correct answer

230230

Explanation

The pattern is ×1+1,×2+2,×3+3,×4+4,×5+5,×6+6\times1+1, \times2+2, \times3+3, \times4+4, \times5+5, \times6+6. So 57×4+4=23257 \times 4 + 4 = 232, not 230230.

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