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Based on the English alphabetical order, three of the following four letter-cluster pairs are alike in a certain way and thus form a group. Which pair 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.)
AK-VH
YI-TD
SC-NX
LV-GQ
AK-VH
Calculate the alphabetical forward/backward difference or positional sum for each letter pair. Look for a consistent pattern across letter-cluster pairs.
Calculate the alphabetical forward/backward difference or positional sum for each letter pair. Look for a consistent pattern across letter-cluster pairs.
Analyze Pair 1 (AK - VH)
A is 1, K is 11 (difference +10); V is 22, H is 8 (difference -14).
Analyze Pair 2 (YI - TD)
Y is 25, I is 9 (difference -16); T is 20, D is 4 (difference -16). Both parts show a consistent -16 shift.
Analyze Pair 3 (SC - NX)
S is 19, C is 3 (difference -16); N is 14, X is 24 (difference +10).
Analyze Pair 4 (LV - GQ)
L is 12, V is 22 (difference +10); G is 7, Q is 17 (difference +10). Both parts show a consistent +10 shift.
B: AK - VH follows a mixed positional difference. C: SC - NX follows a mixed difference pattern. D: LV - GQ follows a uniform +10 forward shift pattern.
A is correct because YI - TD has a unique uniform -16 backward shift in both letter clusters, whereas other pairs follow different rules.
In letter-cluster classification questions, always write down the numerical alphabetical positions (1-26) to quickly test differences and sums.
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