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Number and Letter Series · Question 54 of 68

Question 54

EasyOriginal question

Find the wrong term in the series 5, 11, 17, 23, 30, 35.

Options for question 54

Show the answer and explanation
CorrectNot quiteAnswer D

Correct answer: D

Explanation

  1. Differences: 6, 6, 6, 7, 5. The pattern is +6, broken at the fifth term.

  2. 23+6=2923 + 6 = 29, and 29+6=3529 + 6 = 35 fits the last term, so 30 is wrong (it should be 29).

Worth noting

A wrong term spoils TWO differences (here 7 and 5). The term shared by both odd differences is the culprit.

Concept
Wrong term in a constant-difference series
Typical time
40 s
Your time
—
The rule this testsWrong or missing term
Practise this chapter →

Ten questions from Number and Letter Series, at your own pace.

Practise this chapter →

Ten questions from Number and Letter Series, at your own pace.