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Based on the English alphabetical order, three of the following four letter-clusters are alike in a certain way and thus form a group. Which letter-cluster DOES NOT belong to that group? (Note: The odd one out is not based on the number of consonants/vowels or their position in the letter-cluster.)
TYX
OTS
FHJ
CHG
FHJ
Quick Trick: Convert letters to positional values: TYX (+5, -1), OTS (+5, -1), CHG (+5, -1). FHJ (+2, +2) breaks the pattern instantly.
Convert letters to positional values: TYX (+5, -1), OTS (+5, -1), CHG (+5, -1). FHJ (+2, +2) breaks the pattern instantly.
Convert Letters to Alphabetical Positions
Write down the 1-based English alphabetical positional values for each cluster: T=20, Y=25, X=24; O=15, T=20, S=19; F=6, H=8, J=10; C=3, H=8, G=7.
Analyze the Positional Pattern
Check differences between consecutive letters: Option A (TYX) = 20 (+5) -> 25 (-1) -> 24. Option B (OTS) = 15 (+5) -> 20 (-1) -> 19. Option D (CHG) = 3 (+5) -> 8 (-1) -> 7.
Identify the Odd Pattern
Check Option C (FHJ): F (6) (+2) -> H (8) (+2) -> J (10). It follows (+2, +2) instead of (+5, -1).
A: Follows the common pattern 1st letter + 5 = 2nd letter, 2nd letter - 1 = 3rd letter (20, 25, 24). B: Follows the common pattern 1st letter + 5 = 2nd letter, 2nd letter - 1 = 3rd letter (15, 20, 19). D: Follows the common pattern 1st letter + 5 = 2nd letter, 2nd letter - 1 = 3rd letter (3, 8, 7).
Option C (FHJ) is correct because it follows a (+2, +2) positional difference rule, whereas all other three letter-clusters follow a (+5, -1) rule.
When solving letter classification questions, always convert letters into their numerical positions immediately. Ignore vowel/consonant rules unless explicit positional logic yields no clear pattern.