Logical Reasoning - Number series
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13.
Look at this series: 14, 28, 20, 40, 32, 64, ... What number should come next?
Answer: B
Explanation:
This is an alternating multiplication and subtracting series: First, multiply by 2 and then subtract 8.
14.
Look at this series: 2, 4, 6, 8, 10, ... What number should come next?
Answer: B
Explanation:
This is a simple addition series. Each number increases by 2.
15.
Look at this series: 201, 202, 204, 207, ... What number should come next?
A. 205
B.
208
C.
210
D.
211
Answer: D
Explanation:
In this addition series, 1 is added to the first number; 2 is added to the second number; 3 is added to the third number; 4 is added to the fourth number; and go on.
16.
Look at this series: 544, 509, 474, 439, ... What number should come next?
A. 404
B.
414
C.
420
D.
445
Answer: A
Explanation:
This is a simple subtraction series. Each number is 35 less than the previous number.
17.
Look at this series: 80, 10, 70, 15, 60, ... What number should come next?
Answer: A
Explanation:
This is an alternating addition and subtraction series. In the first pattern, 10 is subtracted from each number to arrive at the next. In the second, 5 is added to each number to arrive at the next.
18.
Look at this series: 2, 6, 18, 54, ... What number should come next?
A. 108
B.
148
C.
162
D.
216
Answer: C
Explanation:
This is a simple multiplication series. Each number is 3 times more than the previous number.
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