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- Logical Reasoning
- Number Series
- Section 4
Directions :
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.
6.
Look at this series: 72, 76, 73, 77, 74, __, 75, . . . What number should fill the blank?
- A.70
- [C]75
- B.71
- D.78
- Answer & Explanation
- Report
Answer : [D]
Explanation :
Explanation :
| This series alternates the addition of 4 with the subtraction of 3. |
7.
Look at this series: 4, 7, 25, 10, __, 20, 16, 19, . . . What number should fill the blank?
- A.13
- [C]20
- B.15
- D.28
- Answer & Explanation
- Report
Answer : [A]
Explanation :
Explanation :
| 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. |
8.
Look at this series: V, VIII, XI, XIV, __, XX, . . . What number should fill the blank?
- A.IX
- [C]XV
- B.XXIII
- D.XVII
- Answer & Explanation
- Report
Answer : [D]
Explanation :
Explanation :
| This is a simple addition series; each number is 3 more than the previous number. |
9.
Look at this series: 8, 43, 11, 41, __, 39, 17, . . . What number should fill in the blank?
- A.8
- [C]43
- B.14
- D.44
- Answer & Explanation
- Report
Answer : [B]
Explanation :
Explanation :
| This is a simple alternating addition and subtraction series. The first series begins with 8 and adds 3; the second begins with 43 and subtracts 2. |
10.
Look at this series: F2, __, D8, C16, B32, . . . What number should fill the blank?
- A.A16
- [C]E4
- B.G4
- D.E3
- Answer & Explanation
- Report
Answer : [C]
Explanation :
Explanation :
| The letters decrease by 1; the numbers are multiplied by 2. |
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