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English and Logical Reasoning Prep GuideLogical ReasoningSeries Completion

Paragraph: Start off with these simple series of numbers. Number series questions measure your ability to reason without words. To answer these questions, you must determine the pattern of the numbers in each series before you will be able to choose which number comes next. These questions involve only simple arithmetic. Although most number series items progress by adding or subtracting, some questions involve simpl

Options

  1. A14
  2. B15
  3. C21
  4. D23

Correct answer

C. 21

Step-by-step solution

In this alternating repetition series, the random number 21 is interpolated every other number into an otherwise simple addition series that increases by 2 , beginning with the number 9 .

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