Direction In each series, look for the degree and direction of change between the numbers. In other words, do the numbers increase or decrease, and by how much-
31.

11 16 21 26 31 36 41
A. 47 52
 B. 46 52
C. 45 49
 D. 46 51
Answer and Explanation
Answer: D

Explanation: In this simple addition series, each number is 5 more than the previous number.




32.

3 8 13 18 23 28 33
A. 39 44
 B. 38 44
C. 38 43
 D. 37 42
Answer and Explanation
Answer: C

Explanation: In this simple addition series, each number is 5 greater than the previous number.




33.

84 78 72 66 60 54 48
A. 44 34
 B. 42 36
C. 42 32
 D. 40 34
Answer and Explanation
Answer: B

Explanation: In this simple subtraction series, each number is 6 less than the previous number.




34.

20 20 17 17 14 14 11
A. 8 8
 B. 11 11
C. 11 14
 D. 8 9
Answer and Explanation
Answer: E

Explanation: This is a simple subtraction with repetition series. It begins with 20, which is repeated, then 3 is subtracted, resulting in 17, which is repeated, and so on.




35.

61 57 50 61 43 36 61
A. 29 61
 B. 27 20
C. 31 61
 D. 22 15
Answer and Explanation
Answer: E

Explanation: This is an alternating repetition series, in which a random number, 61, is interpolated as every third number into an otherwise simple subtraction series. Starting with the second number, 57, each number (except 61) is 7 less than the previous number.