Expert tips to solve Input-Output questions quickly in SBI Clerk exam! 

 Expert tips to solve Input-Output questions quickly in SBI Clerk exam! 

Input-Output is a prominent topic of Reasoning Ability section and one can easily find around 5-7 questions from this topic in the mains phase of various bank exams. However, in the recent exams, this topic has also been included in the prelims phase as well.  

So, in this post, we will discuss some important tips which one must follow in order to solve Input-Output questions quickly in the SBI Clerk Exam.  

A new pattern has been introduced in this topic in the recent bank exams. The candidates can expect questions from latest exam pattern in the SBI Clerk exam


Tips to solve Input-Output questions for SBI Clerk Exam 

Questions based on old pattern: – It is basically a sequence consisting of some numbers, alphabets, special symbols or mixed sequences. In first few seconds the candidates should able to identify the type of input- output. The patterns can be divided in the following categories:-  

  • The sequence in which in every next step only one word is changed. (in either direction right or left).  
  • The sequence in which in every next only one word is changed in either direction but first alphabets are changed than numbers.  
  • Two words are changed in every next step in either direction and the words may be mix of alphabets and number or first alphabets arranged than numbers.  
  • The sequences in which first words are arranged and after certain step, the words are coded using particular pattern. 

Once the candidates are able to identify the patterns to be followed, the main thing is to save the time. There are certain techniques to save time in such questions. The techniques are:- 

Instead of writing complete words again and again, give certain codes to the words i.e. 

Boy 87 Evening 96 Night Morning School 32 56 74 Again 

Bo 87 96 Ev Ni Mo Sc 32 56 74 Ag 

Suppose the pattern is arranging words in alphabetical order and numbers in decreasing order.  

The first step would be then:-  

Ag 87 96 Ev Ni Mo Sc 32 56 74  

             Ev 96 Ni Mo Sc 32 56 74      In second step just start write those words which are changing 

Note: – While using this method be careful in case of shifting patterns where whole sequence shifts in every step.  

The candidates must practice questions of various difficulty levels including questions from previous year’s exams. There are certain patterns on which questions are framed; therefore the candidates must practice large number of questions on all patterns. The candidates are required to practice questions to hone logical reasoning. While practicing questions at home try to note down patterns and analyze the complexity of logics. In exam you should approach sequences with mathematical and logical approach. Try to find the logics operations like:- 

  • Adding elements of previous step in a certain order. 
  • Multiplication of elements. 
  • Reciprocals of the alphabets. 
  • Operation on numbers and alphabets. 
  • Coding of elements in certain symbols. 
  • Division operations on elements of previous steps.   

Now a day the questions are asked in new input-output patterns also. The candidates are required to find the logic to arrive at the next step from previous step. The calculation speed in such questions comes with experience. First of categorize the possible types and logics to practice and gain experience. The broader categories are given below:- 

Input pattern containing numbers only: – In such machine inputs the input to computing machine contains numbers only i.e.  

3 2  2 4  1 6  7 5  2 2  9 3 


1 0  4 8  9 8 


5 8  3 6 



2 2 

 In such questions do careful analysis of patterns and try to find out the logic behind working of this computing machine. In the above input after careful analysis one can find the logic easily which is:- 

Step 1:- Six pairs are converting into three pair. In this step there is some operation done on two pairs of input. The next task is to find that which pairs will give this step. Use hit and trial method to arrive at this step, the first number of first pair of input is multiplied with the first number of fourth pair and gives the first number of first pair of step 1. Similarly for second number of first pair of input is multiplication of second number of first pair of input with the second number of fourth pair of input. This pattern is followed to find the next two pairs of step 1. Also if the result of multiplication is in two digits we will take the unit digit only. 

Step 2:- Most of the time in puzzles it is. The next operators comes in mind are addition and subtraction. After careful analysis you can see the first number of first pair of second step is addition of first number of first pair and first number of second pair of step 1. Similarly we can find the second number of first pair of step 2 and so on. And if sum is in two digits take the first digit only.  

Step 3:- In last step the difference of first number of first pair and first number of second pair is calculated.  

Input pattern containing alphabets only: – In such patterns a sequence of alphabets are given on which certain operations are applied.  

A N  M T  Y F  R K  R X  P A 


Y L  M F  A T  H T  H B  J Y 


M  G  H  I  F  L 


14  20  19  18  21  15 


29  41  37 


2  5  1 




Step 1:- For this step, we have to use the hit and trial method to find the pattern followed.  After careful analysis we can see that the first alphabet of first pair of number is reciprocal -1 of the first number of first pair of input string. A – Z; Z – 1 = Y, similarly for the rest of the alphabets same pattern is followed.  

Step 2:- In step 2, the difference of numerical values of alphabets of pairs of previous step is given in alphabetical form. And if the difference is negative we will add 27 to make it positive. For example          X – E = S 

Step 3:- In this step the numerical value of alphabet of previous step is subtracted from 27. For example 27 – S (19) = 8 

Step 4:- Add first and last number of previous step, similarly second and second last step keep on adding.  

Step 5:- In this step the first number is the digit sum of first number of previous step. For example 2 + 3 = 5, 4 + 0 = 4. 

Step 6:- In this step the pattern followed is first number*second + third 

Input pattern mix of both alphabets and numbers: – In such questions the input sequences are mix of alphabets and numbers. The candidates are required to apply logics to drive next step from previous step 

2 B  5 H  4 R  6 Q  12 M  13 R 


Y 25  V 19  W 9  U 10  O 14  M 9 


Apply hit and trial operations on the input sequence; the logic behind this machine is that first element of second step is the reciprocal of the alphabet formed using first element of first step. The second element of second step is the difference of 27 and the numerical value of the second element of the first step. 

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