SSC Reasoning Coding-Decoding: Tricks, Examples & Practice [2025]
Coding-Decoding is one of the most important topics in SSC Reasoning. In this blog, you will learn step-by-step tricks, solved examples, and practice questions that will help you score high in SSC exams. We have also included a downloadable PDF cheat sheet to make your preparation easier.
Types of Coding-Decoding
1. Letter Coding
In this type, letters are replaced according to a pattern. For example:
Example: A → D, B → E, C → F. Find the code for “BAD”.
Solution: B → E, A → D, D → G → Code = E D G
2. Number Coding
Numbers are replaced using mathematical operations or patterns. For example:
Example: 2 → 6, 3 → 12, 4 → 20. Find the code for 5.
Solution: Pattern = n × (n+1) → 5 × 6 = 30
3. Symbol Coding
Symbols are used to represent letters or numbers. Understanding the logical pattern is key.
4. Mixed Coding
Combination of letters, numbers, and symbols. Recognize the pattern carefully before solving.
Step-by-Step Tricks to Solve Coding-Decoding
- Identify the type of coding.
- Look for alphabet shift or number patterns.
- Break the code into parts if mixed.
- Use elimination method for multiple-choice questions.
- Practice daily to improve speed and accuracy.
Practice Questions
Q1: If CAT → DBU, what is DOG → ?
Solution: Each letter is shifted +1 → DOG → EPH
Q2: 1 → 3, 2 → 6, 3 → 9. Find 4 → ?
Solution: Multiply by 3 → 4 × 3 = 12
Q3: If PEN → QFO, what is MAP
Solution:Each letter is shifted +1
P +1 is Q
E +1 is F
N +1 is O
What is MAP ?
M +1 is N
A +1 is B
P +1 is Q
ANS:- NBQ
Conclusion
Coding-Decoding is easy once you learn the patterns and tricks. Daily practice will improve your speed and accuracy. Make sure to go through the examples and PDF notes regularly. Happy studying!
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