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Look at this series: 7, 10, 8, 11, 9, 12, ... What number should come next?
A.7 B.10 C.12 D.13
Answer: Option B
Explanation:
This is a simple alternating addition and subtraction series. In the first pattern, 3 is added; in the second, 2 is subtracted.
Look at this series: 36, 34, 30, 28, 24, ... What number should come next?
A.20 B.22 C.23 D.26
Answer: Option B
Explanation:
This is an alternating number subtraction series. First, 2 is subtracted, then 4, then 2, and so on.
Look at this series: 22, 21, 23, 22, 24, 23, ... What number should come next?
A.22 B.24 C.25 D.26
Answer: Option C
Explanation:
In this simple alternating subtraction and addition series; 1 is subtracted, then 2 is added, and so on.
Look at this series: 53, 53, 40, 40, 27, 27, ... What number should come next?
A.12 B.14 C.27 D.53
Answer: Option B
Explanation:
In this series, each number is repeated, then 13 is subtracted to arrive at the next number.
Look at this series: 21, 9, 21, 11, 21, 13, 21, ... What number should come next?
A.14 B.15 C.21 D.23
Answer: Option B
Explanation:
In this alternating repetition series, the random number 21 is interpolated every other number into an otherwise simple addition series that increases by 2, beginning with the number 9.
Look at this series: 58, 52, 46, 40, 34, ... What number should come next?
A.26 B.28 C.30 D.32
Answer: Option B
Explanation:
This is a simple subtraction series. Each number is 6 less than the previous number.
Look at this series: 3, 4, 7, 8, 11, 12, ... What number should come next?
A.7 B.10 C.14 D.15
Answer: Option D
Explanation:
This alternating addition series begins with 3; then 1 is added to give 4; then 3 is added to give 7; then 1 is added, and so on.
Look at this series: 8, 22, 8, 28, 8, ... What number should come next?
A.9 B.29 C.32 D.34
Answer: Option D
Explanation:
This is a simple addition series with a random number, 8, interpolated as every other number. In the series, 6 is added to each number except 8, to arrive at the next number.
Look at this series: 31, 29, 24, 22, 17, ... What number should come next?
A.15 B.14 C.13 D.12
Answer: Option A
Explanation:
This is a simple alternating subtraction series, which subtracts 2, then 5.
Look at this series: 14, 28, 20, 40, 32, 64, ... What number should come next?
A.52 B.56 C.96 D.128
Answer: Option B
Explanation:
This is an alternating multiplication and subtracting series: First, multiply by 2 and then subtract 8.
28 25 5 21 18 5 14
A.11 5 B.10 7 C.11 8 D.5 10 E.10 5
Answer: Option A
Explanation:
This is an alternating subtraction series with the interpolation of a random number, 5, as every third number. In the subtraction series, 3 is subtracted, then 4, then 3, and so on.
8 11 21 15 18 21 22
A.25 18 B.25 21 C.25 29 D.24 21 E.22 26
Answer: Option B
Explanation:
This is an alternating addition series, with a random number, 21, interpolated as every third number. The addition series alternates between adding 3 and adding 4. The number 21 appears after each number arrived at by adding 3.
9 16 23 30 37 44 51
A.59 66 B.56 62 C.58 66 D.58 65 E.54 61
Answer: Option D
Explanation:
Here is a simple addition series, which begins with 9 and adds 7.
2 8 14 20 26 32 38
A.2 46 B.44 50 C.42 48 D.40 42 E.32 26
Answer: Option B
Explanation:
This is a simple addition series, which begins with 2 and adds 6.
9 11 33 13 15 33 17
A.19 33 B.33 35 C.33 19 D.15 33 E.19 21
Answer: Option A
Explanation:
In this alternating repetition series, a random number, 33, is interpolated every third number into a simple addition series, in which each number increases by 2.
42 40 38 35 33 31 28
A.25 22 B.26 23 C.26 24 D.25 23 E.26 22
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.
6 10 14 18 22 26 30
A.36 40 B.33 37 C.38 42 D.34 36 E.34 38
Answer: Option E
Explanation:
This simple addition series adds 4 to each number to arrive at the next.
8 12 9 13 10 14 11
A.14 11 B.15 12 C.8 15 D.15 19 E.8 5
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.
36 31 29 24 22 17 15
A.13 11 B.10 5 C.13 8 D.12 7 E.10 8
Answer: Option E
Explanation:
This is an alternating subtraction series, which subtracts 5, then 2, then 5, and so on.
14 14 26 26 38 38 50
A.60 72 B.50 62 C.50 72 D.62 62 E.62 80
Answer: Option B
Explanation:
In this simple addition with repetition series, each number in the series repeats itself, and then increases by 12 to arrive at the next number.
Look at this series: F2, __, D8, C16, B32, ... What number should fill the blank?
A.A16 B.G4 C.E4 D.E3
Answer: Option C
Explanation:
The letters decrease by 1; the numbers are multiplied by 2.
Look at this series: 664, 332, 340, 170, ____, 89, ... What number should fill the blank?
A.85 B.97 C.109 D.178
Answer: Option D
Explanation:
This is an alternating division and addition series: First, divide by 2, and then add 8.
Look at this series: V, VIII, XI, XIV, __, XX, ... What number should fill the blank?
A.IX B.XXIII C.XV D.XVII
Answer: Option D
Explanation:
This is a simple addition series; each number is 3 more than the previous number.
Look at this series: 70, 71, 76, __, 81, 86, 70, 91, ... What number should fill the blank?
A.70 B.71 C.80 D.96
Answer: Option A
Explanation:
In this series, 5 is added to the previous number; the number 70 is inserted as every third number.
Look at this series: 8, 43, 11, 41, __, 39, 17, ... What number should fill in the blank?
A.8 B.14 C.43 D.44
Answer: Option B
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.