CODING AND DECODING(Alphabet coding) | Sainik, Navodaya and RMS Coaching

CODING AND DECODING

The Coding and Decoding Test is set up to judge the candidate's ability to decipher the rule that codes a particular word.

Alphabet coding is a popular topic in reasoning that involves the manipulation of letters in a sequence to generate a new pattern or code. This coding technique is often used in various competitive exams, job interviews, and puzzle-solving games.

Alphabet coding requires an understanding of the English alphabet, its arrangement, and the ability to recognize patterns and sequences.

In this article, we will discuss the basics of alphabet coding in reasoning.

How to solve problems using this technique.

The English alphabet comprises 26 letters, from A to Z.
To solve problems related to alphabet coding, we need to understand the numerical position of each letter. For example:-
A is the first letter of the alphabet, and its numerical position is 1.
Similarly, B is the second letter, and its numerical position is 2, and so on.
We can represent each letter of the alphabet with its numerical position in the sequence. For instance, A can be represented as 1, B as 2, C as 3, and so on.
To code or decode a message using the alphabet coding technique, we need to perform a specific mathematical operation on each letter of the message. The operation can be any mathematical operation such as addition, subtraction, multiplication, division, etc. We can also use a combination of operations to generate a new code or message.
Let's take an example to understand this concept. Suppose we have a message "APPLE," and we want to code it using the alphabet coding technique. We can represent each letter with its numerical position in the alphabet sequence, i.e., A=1, P=16, L=12, and E=5. We can now perform any mathematical operation on these numbers to generate a new code.
For instance, if we add 3 to each number, we get the new code as "DSSOH." Similarly, if we subtract 3 from each number, we get the new code as "XMMLB." We can also use a combination of operations to generate a new code. For example, if we add 3 to the first two letters and subtract 3 from the last two letters, we get the new code as "DSOJB."
To decode a message that has been coded using the alphabet coding technique, we need to perform the reverse operation.
For example, if we have a coded message "DSSOH" that has been generated by adding 3 to each letter of the original message, we can decode it by subtracting 3 from each letter. Thus, the original message is "APPLE."

In conclusion, alphabet coding is a technique used to encode or decode a message by manipulating letters in a sequence using mathematical operations.

To solve problems related to alphabet coding, we need to understand the English alphabet's arrangement, its numerical position, and how to recognize patterns and sequences. With practice and patience, anyone can master the art of alphabet coding in reasoning.

EXERCISE-1

1) In an alphabet coding system, 'MARCH' is written as 'PEWIO'. What will be the code for 'BRAND' in the same coding system?
a. CTDOE
b. EVFTK
c. ETENF
d. CTFNF
Answer: b. EVFTK

2) In a certain code, the letter 'A' is coded as 'Z', 'B' is coded as 'Y', and so on. What will be the code for 'HELLO'?
a. SVOOL
b. SVOLL
c. SOVOL
d. SOOLL
Answer: a. SVOOL

3) In a certain code, 'DEAR' is written as 'AHXU' and 'MORE' is written as 'JROH'. What will be the code for 'LAMP' in the same code?
a. PQGS
b. IDGS
c. IDJS
d. PGJS
Answer: c. IDJS

4) In a certain code, 'APPLE' is written as 'ELPPA' and 'BERRY' is written as 'YRREB'. What will be the code for 'LEMON' in the same code?
a. NOLEM
b. NOMEL
c. OMNLS
d. OGPNS
Answer: b. NOMEL

5) In a certain code, 'LEADER' is written as 'AELRED' and 'PILLOW' is written as 'LIPWOL'. What will be the code for 'HOCKEY' in the same code?
a. COHYEK
b. YEKCOH
c. DZKDLE
d. EZKDLD
Answer: a. COHYEK

EXERCISE-2

1) If "CAT" is coded as "EDW", what is the code for "DOG"?
a) GPH
b) FRJ
c) ERF
d) EOG
Answer: b) FRJ

2) If "BRAVE" is coded as "LWJOM", what is the code for "CRAZY"?
a) MWJSG
b) LSAXV
c) KUXAH
d) IVTRE
Answer: a) MWJSG

3) If "MOUSE" is coded as "PEXVG", what is the code for "RABIT"?
a) TBCCK
b) TCBDJ
c) UQELV
d) SCBDJ
Answer: c) UQELV

4) If "APPLE" is coded as "CRRNG", what is the code for "LEMON"?
a) QOJSR
b) NGOQP
c) QNJSR
d) PGQOR
Answer: b) NGOQP

5) If "COW" is coded as "FRZ", what is the code for "PIG"?
a) SLJ
b) RLI
c) RJK
d) RMI
Answer: a) SLJ