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What should come in place of the question mark (?) in the given series based on the English alphabetical order? RDKW, WIPB, BNUG, GSZL, ?
LKJU
LXDE
LXEQ
LQSW
LXEQ
Calculate the difference between corresponding letters of consecutive clusters; the pattern +5, +5, +5, +5 repeats across all four positions.
Calculate the difference between corresponding letters of consecutive clusters; the pattern +5, +5, +5, +5 repeats across all four positions.
Analyze the first letter of each cluster
R (18) to W (23) is +5. W (23) to B (28/2) is +5. B (2) to G (7) is +5. Next letter is G (7) + 5 = 12, which is L.
Analyze the second letter of each cluster
D (4) to I (9) is +5. I (9) to N (14) is +5. N (14) to S (19) is +5. Next letter is S (19) + 5 = 24, which is X.
Analyze the third and fourth letters
Third letters: K(11), P(16), U(21), Z(26). Adding 5 to Z gives 5 (E). Fourth letters: W(23), B(28/2), G(7), L(12). Adding 5 to L gives 17 (Q).
A: Starts with L, but second letter is K, not X. B: Starts with L, but third letter is D, not E. D: Starts with L, but second letter is Q, not X.
C is correct because the series follows a consistent pattern where every letter in the cluster shifts forward by 5 positions in the English alphabet, resulting in LXEQ.
When solving multi-letter series, always solve the first letter first to eliminate options quickly, then move to the last letter to confirm the remaining choices.
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