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Vowel/Consonant Coding

Vowel-Consonant Coding applies different transformation rules based on whether a letter is a vowel (A, E, I, O, U) or a consonant. Vowels may be replaced by numbers (A=1, E=2, I=3, O=4, U=5), shifted, or replaced with next vowels. Consonants may be shifted forward or backward, replaced by opposite letters, or remain unchanged.

10Worksheets
200+Practice Questions
IntermediateDifficulty
2-3 hoursHours to Master

What You'll Learn

Introduction & Overview Why This Matters How to Solve Pro Tips & Tricks
Shortcut Methods Common Mistakes Practice Worksheets Exam Importance

Introduction to Vowel/Consonant Coding

Vowel-Consonant Coding applies different transformation rules based on whether a letter is a vowel (A, E, I, O, U) or a consonant. Vowels may be replaced by numbers (A=1, E=2, I=3, O=4, U=5), shifted, or replaced with next vowels. Consonants may be shifted forward or backward, replaced by opposite letters, or remain unchanged.

Prerequisites

Vowel/consonant identification (A,E,I,O,U are vowels) Alphabet position knowledge Basic coding rules (shift, substitute) Conditional logic application
Why This Matters: Vowel-Consonant Coding appears in 1-2 questions in SSC CGL and Banking PO exams. It tests conditional rule application and letter classification.

How to Solve Vowel/Consonant Coding Problems

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Step 1: Identify the rule for vowels and the rule for consonants

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Step 2: Check each letter of the word to determine if it is a vowel or consonant

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Step 3: Apply the vowel rule to vowel letters

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Step 4: Apply the consonant rule to consonant letters

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Step 5: Combine the transformed letters in the same order

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Step 6: Verify the transformation is consistent with given examples

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Step 7: Present the coded word

Pro Strategy: First identify which letters are vowels (A, E, I, O, U) and which are consonants. Apply the appropriate rule to each letter individually. Keep the order of letters the same.

Example Problem

Example: Vowels are replaced by their position number (A=1,E=2,I=3,O=4,U=5). Consonants are shifted by +1 (B→C, C→D). Code 'CAT'. Solution: Step 1: C is consonant → +1 shift → D Step 2: A is vowel → position number → 1 Step 3: T is consonant → +1 shift → U Step 4: Coded word = D1U Answer: D1U

Pro Tips & Tricks

  • Vowels: A, E, I, O, U (Y is usually a consonant unless specified otherwise)
  • Common vowel rules: replace with number (A=1,E=2,I=3,O=4,U=5), shift by +1 (A→B, E→F), replace with next vowel (A→E, E→I)
  • Common consonant rules: shift by +1, shift by -1, replace with opposite letter, remain unchanged
  • Write the word and mark vowels vs consonants before coding
  • Always check if the rule applies to each letter independently
  • For vowel→number coding, memorize the mapping: A=1, E=2, I=3, O=4, U=5

Shortcut Methods to Solve Faster

Vowels = A(1), E(5), I(9), O(15), U(21)
To check if a letter is vowel, see if it's in {A,E,I,O,U}
Consonants are all other letters
For vowel→number coding, memorize: A=1, E=2, I=3, O=4, U=5
For vowel→next vowel: A→E, E→I, I→O, O→U, U→A

Common Mistakes to Avoid

Forgetting that Y is usually a consonant
Applying the wrong rule to vowels vs consonants
Not handling case sensitivity (all letters are usually uppercase)
Applying the vowel rule to consonants or vice versa

Ready to Master Vowel/Consonant Coding?

Start with Worksheet 1 and work your way up to expert level! Each worksheet includes:

20 practice questions
Detailed solutions
Step-by-step explanations
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