Logical Reasoning-session1-testing

session-1 LR-1
Find the number that fits somewhere into the middle of the series. Some of the items involve both numbers and letters
1. 
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.
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.
3. 
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.
4. 
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.
5. 
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.