Number Series

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

  • Look at this series: 2, 1, (1/2), (1/4), … What number should come next?
  1. (1/3)
  2. (1/8)
  3. (2/8)
  4. (1/16)

 

Answer: Option B

Explanation:

This is a simple division series; each number is one-half of the previous number.

In other terms to say, the number is divided by 2 successively to get the next result.

4/2 = 2
2/2 = 1
1/2 = 1/2
(1/2)/2 = 1/4
(1/4)/2 = 1/8 and so on.

 

  • Look at this series: 53, 53, 40, 40, 27, 27, … What number should come next?
  1. 12
  2. 14
  3. 27
  4. 53

Answer: Option B

Explanation:

In this series, each number is repeated, then 13 is subtracted to arrive at the next number.
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