Coding-Decoding for Bank Exams
Coding-Decoding Mastery (Professional Level)
Coding-Decoding is a high-scoring topic in reasoning. Questions are based on identifying patterns between words, numbers, or symbols.
1. Types of Coding
- Letter Coding
- Number Coding
- Alphanumeric Coding
- New Pattern Coding
2. Basic Concept
Each letter has a position:
A=1, B=2, C=3 ... Z=26
3. Letter Shift Pattern
Example: CAT → DBU (+1 shift)
C→D, A→B, T→U
4. Reverse Coding
A = Z, B = Y, C = X
Example: CAT → XZG
5. Number Coding
Sum of letter positions
Example: CAT = 3 + 1 + 20 = 24
6. New Pattern Coding
Combination of multiple patterns
Example: Shift + Reverse + Addition
7. Shortcut Tricks
- Check letter positions
- Look for + or - patterns
- Check reverse coding
- Identify pattern quickly
Speed Strategy
- Write alphabet positions mentally
- Check pattern in first 2 examples
- Avoid overthinking
- Practice different patterns
Practice Questions
1. DOG → EPH, find CAT?
2. BAT → 23, find CAT?
3. If A=Z, B=Y, then CAT = ?
4. ABC → BDF, find DEF?
Pattern Recognition Improves Speed
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