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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.)
WC - BF
TZ - YC
BH - GK
AD - YW
AD - YW
Calculate the alphabetical distance between the first and second letter of each pair. Three pairs will share the same gap, while the outlier will have a different numerical difference.
Calculate the alphabetical distance between the first and second letter of each pair. Three pairs will share the same gap, while the outlier will have a different numerical difference.
Analyze WC-BF
W(23) to C(3): The circular difference is 3-23 = -20, which is +6 (mod 26). B(2) to F(6): Difference is +4.
Analyze TZ-YC
T(20) to Z(26): Difference is +6. Y(25) to C(3): The circular difference is 3-25 = -22, which is +4 (mod 26).
Analyze BH-GK
B(2) to H(8): Difference is +6. G(7) to K(11): Difference is +4.
Analyze AD-YW
A(1) to D(4): Difference is +3. Y(25) to W(23): Difference is -2.
A: WC has a gap of 6, and BF has 4. B: TZ has a gap of 6, and YC has 4. C: BH has a gap of 6, and GK has 4. Option D is the only pair that does not follow the +6, +4 pattern.
D is correct because the logic followed by options A, B, and C is that the first pair of letters has a difference of +6, and the second pair has a difference of +4, which AD-YW does not follow.
When evaluating letter clusters, always convert letters to their numerical positions (A=1, Z=26) first to simplify finding patterns.
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