Multiple choice

Directions: Find the wrong term in the given series. 59, 71, 85, 101, 121, 139

  1. 71

  2. 85

  3. 101

  4. 121

  5. 139
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D Correct answer
Explanation

The series follows a pattern of adding consecutive prime numbers: 59+12=71, 71+14=85, 85+16=101, 101+18=119, 119+20=139. The term 121 is incorrect because the pattern requires 119.

AI explanation

The differences between the consecutive prime numbers are 12, 14, 16, 18, and 18. The sequence of differences should consistently increase by 2, making the expected difference before 139 equal to 20. Adding 20 to 101 yields 121, which should be the correct term instead of 121. The wrong term in the series is 121.

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