LOGICAL AND CRITICAL REASONING PROBLEMS:Number Series

Part 14
66. 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
67. Look at this series: 664, 332, 340, 170, __, 89, . . .
What number should fill the blank?
a. 85
b. 97
c. 109
d. 178
68. Look at this series: 0.15, 0.3, __, 1.2, 2.4, . . .
What number should fill the blank?
a. 4.8
b. 0.006
c. 0.6
d. 0.9
69. Look at this series: 1/9 , 1/3 , 1, __, 9, . . . What number
should fill the blank?
a. 2/3
b. 3
c. 6
d. 27
70. Look at this series: U32, V29, __, X23, Y20, . . .
What number should fill the blank?
a. W26
b. W17
c. Z17
d. Z26
Answers:


66. a. In this series, 5 is added to the previous
number; the number 70 is inserted as every
third number.
67. d. This is an alternating division and addition
series: First, divide by 2, and then add 8.
68. c. This is a simple multiplication series. Each
number is 2 times greater than the previous
number.
69. b. This is a multiplication series; each number
is 3 times the previous number.
70. a. In this series, the letters progress by 1; the
numbers decrease by 3.
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