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- 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.
11.
Look at this series: 0.15, 0.3, __, 1.2, 2.4, . . . What number should fill the blank?
- A.4.8
- C.0.6
- B.0.006
- D.0.9
- Answer & Explanation
- Report
Answer : [C]
Explanation :
Explanation :
This is a simple multiplication series. Each number is 2 times greater than the previous number. |
12.
Look at this series: XXIV, XX, __, XII, VIII, . . . What number should fill the blank?
- A.XXII
- C.XVI
- B.XIII
- D.IV
- Answer & Explanation
- Report
Answer : [C]
Explanation :
Explanation :
This is a simple subtraction series; each number is 4 less than the previous number. |
13.
Look at this series: 70, 71, 76, __, 81, 86, 70, 91, . . . What number should fill the blank?
- A.70
- C.80
- B.71
- D.96
- Answer & Explanation
- Report
Answer : [A]
Explanation :
Explanation :
In this series, 5 is added to the previous number; the number 70 is inserted as every third number. |
14.
Look at this series: 664, 332, 340, 170, __, 89, . . . What number should fill the blank?
- A.85
- C.109
- B.97
- D.178
- Answer & Explanation
- Report
Answer : [D]
Explanation :
Explanation :
This is an alternating division and addition series: First, divide by 2, and then add 8. |
15.
Look at this series: 83, 73, 93, 63, __, 93, 43, . . . What number should fill the blank?
- A.33
- C.73
- B.53
- D.93
- Answer & Explanation
- Report
Answer : [B]
Explanation :
Explanation :
This is a simple subtraction series in which a random number, 93, is interpolated as every third number. In the subtraction series, 10 is subtracted from each number to arrive at the next. |