Coding Decoding Reasoning Questions and Answers for Competitive Exams – Tricks, Rules & Practice

Coding Decoding Reasoning Questions and Answers – Complete Notes, Tricks & Practice

Coding-Decoding is one of the most important Reasoning topics asked in competitive exams such as SSC, Railway, Banking, Police, Defence and other government exams. In these questions, letters, numbers, words or sentences are coded according to a specific pattern, and candidates have to identify the rule and find the correct answer. This complete Coding-Decoding Notes covers alphabet positions, letter shifting, reverse coding, opposite letters, number coding, word coding, sentence coding, important tricks, shortcuts, solved examples and practice questions to help you solve Coding-Decoding questions quickly and accurately.

Basic Concept

In coding-decoding questions, a word, letter, number, or sentence is changed according to a particular rule. The changed form is called its code.

You must know the English alphabet positions – MOST IMPORTANT 

Easy trick

• Remember: A B C D E = 1 2 3 4 5, Then continue normally.

EJOTY – Very Easy Trick

• EJOTY is a shortcut to remember the 5th, 10th, 15th, 20th and 25th letters of the alphabet. Each letter comes after 5 positions.

So, whenever you need to quickly find alphabet positions, use EJOTY as your checkpoints.

Example-1: Find the position of R

You know: O = 15

After O: 

P = 16, Q = 17 , R = 18

So R = 18.

Example-2: Find the position of W

You know:

T = 20

U = 21 ,V = 22, W = 23

So W = 23.

Reverse Alphabet Position

Sometimes the alphabet is counted from Z = 1.

FORMULA:

For any letter:  Reverse position = 27 − Normal position

Example: G = 7 in reverse position becomes = 27 − 7 = 20

Therefore, G = 20 in reverse alphabet.

• Opposite Letter Shortcut

The alphabet pairs are: A-Z, B-Y, C-X, D-W, E-V, F-U, G-T, H-S, I-R, J-Q, K-P, L-O, M-N