Master the art of coding and decoding with our comprehensive guide. From basic letter coding to complex pattern recognition.
Coding and Decoding is a logical reasoning concept where words, numbers, or symbols are transformed according to specific rules or patterns. It tests your ability to identify patterns and apply logical rules.
Original: A B C D E F G H I J K L M
Shift +2: C D E F G H I J K L M N O
Example:
HELLO → JGNNQ (shift +2)
| Original | Coded | Rule |
|---|---|---|
| APPLE | ZKKOB | Opposite letter |
| BANANA | YZMZMZ | Previous letter |
Example:
If "CAT" is coded as "TAC", then "DOG" is coded as "GOD"
Rule: Reverse the word
A = 1, B = 2, C = 3, ..., Z = 26
Example:
HELLO → 8 5 12 12 15
Example:
If A=1, B=2, C=3, then:
ABC = 1×2×3 = 6
DEF = 4×5×6 = 120
Original: 1 2 3 4 5
Pattern: +2, ×2, +2, ×2, +2
Result: 3 4 5 8 7
| Letter | Symbol | Rule |
|---|---|---|
| A | @ | First letter |
| E | # | Vowel |
| Z | % | Last letter |
Example:
A1B2C3 → 1A2B3C (Alternate pattern)
XYZ123 → 123XYZ (Group pattern)
Original: A B C D E
Pattern: @ # $ % &
Result: @A #B $C %D &E
Alternating: A1B2C3
Progressive: A, AB, ABC, ABCD
Reverse: HELLO → OLLEH
Math: 2, 4, 6, 8, 10
If "HELLO" is coded as "KHOOR", what is the coding pattern?
Solution:
Shift of +3 letters in the alphabet
If "APPLE" is coded as "ZKKOB", what is "BANANA" coded as?
Solution:
YZMZMZ (Previous letter in alphabet)
"The key to solving coding-decoding problems is to identify the pattern and apply it consistently."