Logical Reasoning - Number Series - Discussion

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

5. 

9 11 33 13 15 33 17

[A]. 19 33
[B]. 33 35
[C]. 33 19
[D]. 15 33
[E]. 19 21

Answer: Option A

Explanation:

In this alternating repetition series, a random number, 33, is interpolated every third number into a simple addition series, in which each number increases by 2.

Sathishkumar said: (Jun 27, 2011)  
Here 33 is common for after every 2 numbers so 33 is compulsory.

Remaining you add 2 for each number so that the answer is 19, 33.

Vino said: (Dec 13, 2011)  
33 common

9+2=11
13+2=15
17+2=19

Neelam said: (Sep 28, 2013)  
33 is common after every 2 number.

9+2=11
11+2=13
9 11 33
13+2=15
15+2=17
13 15 33
17+2=19
17 19 33

P.Hemasai said: (Sep 29, 2014)  
33 is repeating. Just add +2 for 9 and so on.

Hardik said: (Jun 13, 2015)  
33 is common after every 2 number.

11+4=15.
15+4=19.

17 19 33.

Monisha said: (Jul 24, 2015)  
9 11 [33] 13 15 [33] 17 ? [33].

9-11=2.
13-15=2.
17-19=2.

Ans: 17 19.

Utkarsh said: (May 25, 2017)  
Here between 11&9difference is 2 as continues and after every two digits 33 is common So.

17+2 = 19 and next is same as 33 then answer A is correct.

Arokade said: (Jul 1, 2017)  
Please solve and explain.

24 11 9 14 48 ?

Nadi Yonas said: (Aug 6, 2017)  
24*2=48
24-13=11
11-2=9
9+5=14
48-13=35.

35 answer.

Ravali said: (Dec 4, 2019)  
Why not option C is correct?

Revathi said: (Jul 28, 2020)  
@Ravali.

Here 33 is coming after every "2" numbers.

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