Number Series Questions and Answers


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Look carefully for the pattern, and then choose which pair of numbers comes next.

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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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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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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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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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.



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