English and Logical Reasoning Prep Guide
- Exam
- English and Logical Reasoning Prep Guide
- Subject
- Logical Reasoning
- Chapter
- Series Completion
English and Logical Reasoning Prep Guide · Logical Reasoning · Series Completion
Paragraph: This set contains additional number series questions,...
Paragraph: This set contains additional number series questions, some of which are in Roman numerals. These items differ from Sets 1,2 , and 3 because they ask you to find the number that fits somewhere into the middle of the series. Some of the items involve both numbers and letters; for these questions, look for a number series and a letter series. Question: Look at this series: 4, 7, 25, 10, \_\_\_\_ , 20, 16, 19, . . . What number should fill the blank?
Options
- A13
- B15
- C20
- D28
Correct answer
A. 13
Step-by-step solution
Two series alternate here, with every third number following a different pattern. In the main series, 3 is added to each number to arrive at the next. In the alternating series, 5 is subtracted from each number to arrive at the next.