Number Series

12 May 2020


Number series is a sequence or orderly arrangement  formed with numbers. Number Series is the one of the most important topic of Mathematics. In the number series questions, the series are based on sequences of numbers that follow a logical pattern based on basic arithmetic concepts and we have to detect that concept then predict the next number in the sequence by following the same logic.


Practice Questions For Number Series

Q1) 3 2 2 5 5 5 7 8 8 9 11 11 ?

A) 12

B) 11

C) 9

D) 14

Solution :


Q2) 7 9 8 6 10 9 5 11 10 ? 12

A) 4

B) 11

C) 56

D) 5

Solution :


Q3) 1 3 2 6 3 11 4 18 5 ?

A) 27

B) 25

C) 23

D) 29

Solution :


Clear all your Aptitude Concepts from Experts with Aptitude Cracker Course!-https://bit.ly/2YFn39h

Q4) 13 17 23 29 31 37 ??

A) 22

B) 41

C) 19

D) 23

Solution :


Q5) Look at this series: 2, 1, (1/2), (1/4), ... What number should come next? 

A) (1/3) 

B) (1/8) 

C) (2/8) 

D) (1/16) 

Solution :

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. 

Q6) 26, 12, 10, 16, ? 

A) 50

B) 52

C) 53

D) 56

Solution :


Q7) Look carefully for the pattern, and then choose which pair of numbers comes next. 

        2 44 4 41 6 38 8 

A) 10 12 

B) 35 32 

C) 34 9 

D) 35 10 

Solution :

Here, there are two alternating patterns, one addition and one subtraction. The first starts with 2 and increases by 2; the second starts with 44 and decreases by 3. 

Q8) What should come in place of the question mark '?' in the following number series? 

       2916, 972, ?, 108, 36, 12 

A) 324 

B) 234 

C) 248 

D) 391 

Solution :

2916 ÷ 3 = 972 
972 ÷ 3 = 324 = ? 
324 ÷ 3 = 108 
108 ÷ 3 = 36 
36 ÷ 3 = 12 

Looking for ALL IN ONE placement preparation package ? Join our Complete Placement Package! -https://bit.ly/2WC7tIL

Q9) 4, 6, 9, 13, 

A) 15

B) 12

C) 18

D) 17

Solution :

The difference between two consecutive numbers is increasing in the order of 2,3, 4, 5, etc. 

Q10) 210 209 213 186 202 (?) 

A) 138

B) 77

C) 177

D) 327

Solution :

1. (2) The pattern of the number series is : 
210 – 1³= 209 
209 + 2² = 213 
213 – 3³ = 186 
186 + 4² = 202 
202 – 5³ = 202 – 125 = 77 

To test yourself,  click on the FREE TEST SERIES provided by Talent Battle - https://bit.ly/3dmvTNa 

Ask Us Anything !