Coding & Decoding : Coding-Decoding For Reasoning, Mental Ability and Aptitude

Coding-Decoding Tricks For Reasoning, Mental Ability and Aptitude

In this section you will learn some General tricks on Coding and Decoding which will be very Helpful for you in Solving Reasoning , Mental Ability and Aptitude Problems. Given below are some Problems on Coding-Decoding which are generally asked in Competitive exams.

Example No. 1: If the word MAHESH is written as PDKHVK, then how will the word SEEMA be written in that code?

Solution: In this case three has been added in each of the letters in the word. This can be stated as that the third letter has been taken for each of the letters, i.e. two letters are left in the letter and its code.

Therefore while coding SEEMA, add 3 in S and get V, similarly add 3 in E and get H, add 3 in E and get H, add 3 in M and get P and in the end add 3 in A and get D. Hence, the code for the word SEEMA will be VHHPD.

Example No. 2: If PAINT is coded as 74128 and EXCEL IS coded as 93596 then How would you encode ACCEPT?

Solution: In the given code, the alphabets are coded as follows:
P → 7
A → 4
I → 1
N → 2
T → 8

and
E → 9
X → 3
C → 5
E → 9
L → 6

Therefore ACCEPT will be coded as
A → 4
C → 5
C → 5
E → 9
P → 7
T → 8

Example 3: If JOSEPH is coded as FKOALD, then GEORGE will be coded as.
a) CADMNO
b) CAKNCA
c) CAKNIT
d) JAKINS

Solution: Each letter of the word is moved four steps backward to obtain the code. That is,
J → F-4
O → K-4
S → 0-4
E → A-4
P → L-4
H → D-4

Therefore GEORGE will be coded as
G → G-4 = C
E → E-4 = A
O → O-4 = K
R → R-4 = N
G → G-4 = C
E → E-4 = A

Example 4: In a certain code, INSTITUTION is written as NOITUTITSNI. How is PERFECTION written in that code?
a) NOICTEFREP
b) NOITCEFERP
c) NOITCEFRPE
d) NOITCEFREP
e) NOITCEFPER

Solution: Letters of the word INSTITUTION have been just reversed in the coded word. Therefore, PERFECTION will be coded as NOITCEFREP. Hence, option (4) is the correct answer.

Example 5: If ROSE is coded as 6821, CHAIR is coded as 73456 and PREACH is coded as 961473, what will be the code for SEARCH?
a) 246173
b) 214673
c) 214763
d) 216473
e) None of these

Solution: In the given code, the alphabets are coded as follows:
R → 6
O → 8
S → 2
E → 1

C → 7
H → 3
A → 4
I → 5
R → 6

Therefore, SEARCH will be coded as
S → 2
E → 1
A → 4
R → 6
C → 7
H → 3

Learn more on Coding and Decoding from two videos on Coding Decoding Reasoning Tricks given below :-

Coding Decoding Reasoning Tricks Part-1

Coding Decoding Reasoning Tricks Part-2

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