Free Online Preparation for CAT with Minglebox eCAT Prep. Cover basic concepts of Coding, Decoding, Relationships under Data Interpretation for MBA Entrance Exam Preparation with Study material, solved examples and tests prepared by CAT coaching experts.
Problems based on coding generally a pattern which could be either between a set of numbers or set of numbers or set of alphabets etc. We illustrate this more by considering examples on possible coding schemes.
Series having a constant difference between any two consecutive terms find the next term of the series 5,7,9 ....... Answer is 11 as difference between 7 and 5 is 2 and so is the difference between 9 and 7 hence next terms should difference from the previous term by 2.
Series of power of numbers
Example
Find the next term in the series 4, 9, 16, 25, ............ here the first term is , next is etc. hence next term should be .
If this type of coding scheme, the pattern is generated by skipping a few alphabets in the alphabetical series , at a regular internal.
Example
Find the next term of the series
A, C, F, K........ Here we skip one alphabet between A and C and then 2 alphabets viz between cdf and then 3 alphabets between f and k viz and z . Hence we will skip alphabets between k and next term viz , and 0 to get p as the answer.
Coding using position number of alphabet in the alphabetic order. We present the alphabetic and assign number to them as follows
A

B

C

D

E

F

G

H

I

J

K

L

M

1

2

3

4

5

6

7

8

9

10

11

12

13

N

O

P

Q

R

S

T

U

V

W

X

Y

Z

14

15

16

17

18

19

20

21

22

23

24

25

26

Ex:  If 'word' is coded as 2315184 then how will 'simple' be coded as ?
Here we observe 'W' has been replaced by its position code that is by 23 similarly 'O' has been replaced by 15 therefore the word 'SIMPLE' will be coded as
S  19, I  9, M  13, P  16, C  12, E  5
Hence required code 1991316125
We start by listing the relational names of people

Husband's or wife sister  Sister'sinlaw

Sister's husband  Brother'sinlaw

Brother's wife Sisterinlaw etc.
Question

Brother

Son

Father

Uncle
Solution
If X is the brother of Y X is male Y is male or Female
Y is the son of C X is the son of C as X is the brother of Y
C is the uncle of D X is the son of D as X is son of C
Hence answer is option (2)
Question
If x is the brother of Y , Y is the son of C and C is the wife of D , then how is A related to D ?
Summan told Ram  your father's wife's brother is my father's, how is Ram related to Summan ?
Solution
Ram father's wife is Ram's mother and brother of Ram's uncle . Therefore Summan is Ram's uncle's daughter will be Ram's cousin.
Question
If 'SQUARE' is coded as 'QSAVER' then how is 'CIRCLE' codded as
Solution
Here we observe SQ has been replaced by QS VA is replaced by VA etc. Hence we are considering 2 letters of the given word at a time and reversing the order . Therefore 'CIRCLE' will be coded as 'ICCREL' .
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avinash3074 : In the decoding SQUARE question the it should be QSAUER rather than QSAVER
kausik3168 : 'SQUARE'='QSAVER'it should be u and not v change that.....
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