LOGICAL AND CRITICAL REASONING PROBLEMS:Number Series

Part 4 
16. Look at this series: 7, 10, 8, 11, 9, 12, . . . What
number should come next?
a. 7
b. 10
c. 12
d. 13
17. Look at this series: 14, 28, 20, 40, 32, 64, . . .
What number should come next?
a. 52
b. 56
c. 96
d. 128
18. Look at this series: 1.5, 2.3, 3.1, 3.9, . . . What
number should come next?
a. 4.2
b. 4.4
c. 4.7
d. 5.1
19. Look at this series: 5.2, 4.8, 4.4, 4, . . . What
number should come next?
a. 3
b. 3.3
c. 3.5
d. 3.6
20. Look at this series: 2, 1, 1/2 , 1/4 , . . . What number
should come next?
a. 1/3
b. 1/8
c. 2/8
d. 1/16
Answers:

16. b. This is a simple alternating addition and
subtraction series. In the first pattern, 3 is
added; in the second, 2 is subtracted.
17. b. This is an alternating multiplication and
subtracting series: First, multiply by 2 and
then subtract 8.
18. c. In this simple addition series, each number
increases by 0.8.
19. d. In this simple subtraction series, each number
decreases by 0.4.
20. b. This is a simple division series; each number
is one-half of the previous number.
Next