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Number Series - Aptitude Questions and Answers - RejinpaulPlacement

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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

6.
Look at this series: 201, 202, 204, 207, ... What number should come next?
Answer & Solution
Answer: (D) 211

Solution: 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.
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7.
Look at this series: 2, 4, 6, 8, 10, ... What number should come next?
Answer & Solution
Answer: (B) 12

Solution: This is a simple addition series. Each number increases by 2.
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8.
Look at this series: 14, 28, 20, 40, 32, 64, ... What number should come next?
Answer & Solution
Answer: (B) 56

Solution: This is an alternating multiplication and subtracting series: First, multiply by 2 and then subtract 8.
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9.
Look at this series: 1.5, 2.3, 3.1, 3.9, ... What number should come next?
Answer & Solution
Answer: (C) 4.7

Solution: In this simple addition series, each number increases by 0.8.
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10.
Look at this series: 31, 29, 24, 22, 17, ... What number should come next?
Answer & Solution
Answer: (A) 15

Solution: This is a simple alternating subtraction series, which subtracts 2, then 5.
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