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What should come in place of the question mark (?) in the given series based on the English alphabetical order? RQO, LKI, FEC, ZYW, TSQ, ?
NMK
NML
MNL
MNK
NMK
Observe the first letter of each cluster and look for a recurring jump of -6 positions in the alphabet, treating the sequence as cyclical.
Observe the first letter of each cluster and look for a recurring jump of -6 positions in the alphabet, treating the sequence as cyclical.
Analyze the first letter of each triplet
R (18) → L (12) → F (6) → Z (26) → T (20). The pattern is subtract 6: 18-6=12, 12-6=6, 6-6=0(Z), 26-6=20. Next: 20-6=14 (N).
Analyze the second letter of each triplet
Q (17) → K (11) → E (5) → Y (25) → S (19). The pattern is subtract 6: 17-6=11, 11-6=5, 5-6=25(Y), 25-6=19. Next: 19-6=13 (M).
Analyze the third letter of each triplet
O (15) → I (9) → C (3) → W (23) → Q (17). The pattern is subtract 6: 15-6=9, 9-6=3, 3-6=23(W), 23-6=17. Next: 17-6=11 (K).
B: NML is incorrect because the third letter must be K based on the -6 sequence. C: MNL is incorrect because the first letter must be N. D: MNK is incorrect because the first letter must be N.
A is correct because the series follows a consistent pattern of subtracting 6 from the alphabetical position of each letter in the cluster, resulting in N, M, and K.
When solving alphabetical series, convert letters to their numerical positions immediately to quickly identify arithmetic gaps.
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