Number Series Questions and Answers


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

42 40 38 35 33 31 28


A. 25 22
B. 26 23
C. 26 24
D. 25 23
E. 26 22

Answer & Explanation:

Answer: Option C

Explanation: This is an alternating subtraction series in which 2 is subtracted twice, then 3 is subtracted once, then 2 is subtracted twice, and so on.



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6 10 14 18 22 26 30


A. 36 40
B. 33 37
C. 38 42
D. 34 36
E. 34 38

Answer & Explanation:

Answer: Option E

Explanation: This simple addition series adds 4 to each number to arrive at the next.



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8 12 9 13 10 14 11


A. 14 11
B. 15 12
C. 8 15
D. 15 19
E. 8 5

Answer & Explanation:

Answer: Option B

Explanation: This is an alternating addition and subtraction series, in which the addition of 4 is alternated with the subtraction of 3.



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36 31 29 24 22 17 15


A. 13 11
B. 10 5
C. 13 8
D. 12 7
E. 10 8

Answer & Explanation:

Answer: Option E

Explanation: This is an alternating subtraction series, which subtracts 5, then 2, then 5, and so on.



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3 5 35 10 12 35 17


A. 22 35
B. 35 19
C. 19 35
D. 19 24
E. 22 24

Answer & Explanation:

Answer: Option C

Explanation: This is an alternating addition series, with a random number, 35, interpolated as every third number. The pattern of addition is to add 2, add 5, add 2, and so on. The number 35 comes after each "add 2" step.



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