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⁞ Number Series

Reasoning ➤ Number Series ➤ 1

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.

Question 1
Q1.  Look at the series: 22, 21, 23, 22, 24, 23,... What number should come next?
 

Answer :  25


In this simple alternating subtraction and addition series; 1 is subtracted, then 2 is added, and so on.
⚔ DISCUSS

Question 2
Q2.  Look at this series: 2, 1, (1/2), (1/4), ... What number should come next?
 

Answer :  (1/8)


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.
⚔ DISCUSS

Question 3
Q3.  Look at this series: 7, 10, 8, 11, 9, 12, ... What number should come next?
 

Answer :  10


This is a simple alternating addition and subtraction series. In the first pattern, 3 is added; in the second, 2 is subtracted.
⚔ DISCUSS

Question 4
Q4.  Look at this series: 21, 9, 21, 11, 21, 13, 21, ... What number should come next?
 

Answer :  15


In this alternating repetition series, the random number 21 is interpolated every other number into an otherwise simple addition series that increases by 2, beginning with the number 9.
⚔ DISCUSS

Question 5
Q5.  Look at this series: 36, 34, 30, 28, 24, ... What number should come next?
 

Answer :  22


This is an alternating number subtraction series. First, 2 is subtracted, then 4, then 2, and so on.
⚔ DISCUSS

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