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What should come in place of the question mark (?) in the given series based on the English alphabetical order? CGPY, KOXG, SWFO, AENW, ?
IMVE
IVEB
IMNJ
IKJU
IMVE
Analyze the pattern for each of the 4 positions independently; calculate the shift between terms (C+8=K, K+8=S, S+8=A, A+8=I) and verify the subsequent shifts for letters 2, 3, and 4.
Analyze the pattern for each of the 4 positions independently; calculate the shift between terms (C+8=K, K+8=S, S+8=A, A+8=I) and verify the subsequent shifts for letters 2, 3, and 4.
Analyze the first letter of each cluster
C(3) + 8 = K(11); K(11) + 8 = S(19); S(19) + 8 = A(27 which is 1); A(1) + 8 = I(9). First letter is I.
Analyze the second letter of each cluster
G(7) + 8 = O(15); O(15) + 8 = W(23); W(23) + 8 = E(31 which is 5); E(5) + 8 = M(13). Second letter is M.
Analyze the third letter of each cluster
P(16) + 8 = X(24); X(24) + 8 = F(32 which is 6); F(6) + 8 = N(14); N(14) + 8 = V(22). Third letter is V.
Analyze the fourth letter of each cluster
Y(25) + 8 = G(33 which is 7); G(7) + 8 = O(15); O(15) + 8 = W(23); W(23) + 8 = E(31 which is 5). Fourth letter is E.
B: IVEB is wrong because the second and third letters do not follow the +8 sequence. C: IMNJ is wrong because the third and fourth letters do not match the expected V and E. D: IKJU is wrong because the second, third, and fourth letters are incorrect.
A is correct because the series follows a consistent +8 alphabetical shift for each of the four positions in the cluster, resulting in IMVE.
When dealing with four-letter clusters, always solve the first and last letters first to eliminate options quickly, as they often have the most distinct shifts.
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