Multiple choice

In the given series, only one number is wrong. Find the wrong number. 17, 36, 60, 88, 119, 156, 197

  1. 60

  2. 17

  3. 36

  4. 119

  5. 156
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A Correct answer
Explanation

The series is n^2 + 16 (for n=1, 2, 3...). 1^2+16=17, 2^2+16=20 (not 36), 3^2+16=25. Alternatively, differences are 19, 24, 28, 31, 37, 41. The pattern is not immediately obvious, but 60 is the outlier in the sequence 17, 36, 60, 88, 119, 156, 197.

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