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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.)
TQ - OG
ZW - UM
GK - PW
BY - WO
GK - PW
Calculate the alphabetical position difference between the two letters in each cluster. In three pairs, the difference is constant (or related by a fixed pattern), while one pair breaks the pattern.
Calculate the alphabetical position difference between the two letters in each cluster. In three pairs, the difference is constant (or related by a fixed pattern), while one pair breaks the pattern.
Analyze TQ-OG
T(20) - 3 = Q(17). O(15) - 8 = G(7). The pattern is (-3, -8).
Analyze ZW-UM
Z(26) - 3 = W(23). U(21) - 8 = M(13). The pattern is (-3, -8).
Analyze GK-PW
G(7) + 4 = K(11). P(16) + 7 = W(23). The pattern is (+4, +7), which does not match the others.
Analyze BY-WO
B(2) moving backwards through the alphabet: 2 тЖТ 1(A) тЖТ 26(Z) тЖТ 25(Y). That is -3. W(23) - 8 = O(15). The pattern is (-3, -8).
A, B, and D all follow the same logical pattern of subtracting 3 from the first letter and 8 from the second letter in each cluster, while C deviates significantly.
C is correct because it is the only pair that does not follow the -3, -8 alphabetical decrement pattern shared by the other three options.
In letter-cluster series, always convert letters to their numerical positions (A=1, B=2... Z=26) first to identify mathematical shifts.
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