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-
41.

42 40 38 35 33 31 28
A. 25 22
 B. 26 23
C. 26 24
 D. 25 23
Answer and Explanation
Answer: 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.




42.

6 10 14 18 22 26 30
A. 36 40
 B. 33 37
C. 38 42
 D. 34 36
Answer and Explanation
Answer: E

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




43.

8 12 9 13 10 14 11
A. 14 11
 B. 15 12
C. 8 15
 D. 15 19
Answer and Explanation
Answer: B

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




44.

36 31 29 24 22 17 15
A. 13 11
 B. 10 5
C. 13 8
 D. 12 7
Answer and Explanation
Answer: E

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




45.

3 5 35 10 12 35 17
A. 22 35
 B. 35 19
C. 19 35
 D. 19 24
Answer and Explanation
Answer: 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.