16.
9 12 11 14 13 16 15
A. 14 13 B. 18 21
C. 14 17 D. 12 13
E. 18 17
Answer & Explanation
Answer: Option E
Explanation:
This is a simple alternating addition and subtraction series. First, 3 is added, then 1 is subtracted, then 3 is added, 1 subtracted, and so on.
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17.
4 8 22 12 16 22 20 24
A. 28 32 B. 28 22
C. 22 28 D. 32 36
E. 22 26
Answer & Explanation
Answer: Option C
Explanation:
This is an alternating repetition series, with a random number, 22, interpolated as every third number into an otherwise simple addition series. In the addition series, 4 is added to each number to arrive at the next number.
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18.
40 40 31 31 22 22 13
A. 13 4 B. 13 5
C. 4 13 D. 9 4
E. 4 4
Answer & Explanation
Answer: Option A
Explanation:
This is a subtraction series with repetition. Each number repeats itself and then decreases by 9.
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19.
1 10 7 20 13 30 19
A. 26 40 B. 29 36
C. 40 25 D. 25 31
E. 40 50
Answer & Explanation
Answer: Option C
Explanation:
Here, every other number follows a different pattern. In the first series, 6 is added to each number to arrive at the next. In the second series, 10 is added to each number to arrive at the next.
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20.
10 20 25 35 40 50 55
A. 70 65 B. 60 70
C. 60 75 D. 60 65
E. 65 70
Answer & Explanation
Answer: Option E
Explanation:
This is an alternating addition series, in which 10 is added, then 5, then 10, and so on.