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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.)
DI - FK
TY - VA
XB - YC
BG - DI
XB - YC
Calculate the gap between letters in each pair; three pairs will share the same numerical difference pattern, while the outlier will differ.
Calculate the gap between letters in each pair; three pairs will share the same numerical difference pattern, while the outlier will differ.
Analyze the alphabetical gap for each pair
Convert letters to their numerical positions (A=1, B=2,..., Z=26): (DI: D=4, I=9; F=6, K=11) тЖТ Gap 1: 9-4=5, 11-6=5. (TY: T=20, Y=25; V=22, A=1 (or 27)) тЖТ Gap 2: 25-20=5, 27-22=5. (XB: X=24, B=2 (or 28); Y=25, C=3 (or 29)) тЖТ Gap 3: 28-24=4, 29-25=4. (BG: B=2, G=7; D=4, I=9) тЖТ Gap 4: 7-2=5, 9-4=5.
Identify the outlier
Pairs DI (+5, +5), TY (+5, +5), and BG (+5, +5) all follow a constant interval of 5 between and within the clusters. The pair XB (X to B is +4, Y to C is +4) follows an interval of 4, making it the odd one out.
A: DI follows the +5 pattern correctly; B: TY follows the +5 pattern correctly; D: BG follows the +5 pattern correctly.
C is correct because it is the only pair that follows a +4 letter increment pattern, while all other options follow a +5 letter increment pattern.
When comparing letter-clusters, always convert to numerical values (A=1 to Z=26) immediately to quickly spot additive or subtractive patterns.
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