Multiple choice

Directions: Find the wrong term in the following number series. 54, 68, 85, 106, 134, 164

  1. 68

  2. 85

  3. 106

  4. 134

  5. 164
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D Correct answer
Explanation

Differences: 68-54=14, 85-68=17, 106-85=21, 134-106=28, 164-134=30. The pattern of differences should be 14, 17, 20, 23, 26. 134 is incorrect because 106+23=129 and 129+26=155.

AI explanation

The series follows a pattern of adding consecutive composite numbers to the previous term, with the additions being 14, 17, 21, 28, and 30. Adding 14 to 54 gives 68, adding 17 to 68 gives 85, and adding 21 to 85 gives 106. Adding 28 to 106 results in 134, but the correct addition should be 25 to yield 131.

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