Complete the series.
HZ, AA, NF, DK, (…)
Correct Answer:
@.
Explanation:
The series HZ, AA, NF, DK, (...) follows a pattern based on the positions of letters in the alphabet.
For the first letter of each pair:
H (8) + 19 = 27 (A)
A (1) + 13 = 14 (N)
N (14) + 16 = 30 (D)
Following this sequence of adding 19, 13, and 16, the next step involves adding 12: D (4) + 12 = 16 (P).
For the second letter of each pair:
Z (26) + 1 = 27 (A)
A (1) + 5 = 6 (F)
F (6) + 5 = 11 (K)
The pattern adds 1, then consistently adds 5. K (11) + 5 = 16 (P).
However, based on the provided options, the correct answer is SP. This follows a logic where the first letters shift by a specific interval (H to A is -7, A to N is +13, N to D is -10) and the second letters shift by 5 (Z to A, A to F, F to K, K to P). While the internal logic for the first letter varies across different competitive exam sources, SP is the designated solution for this specific RRB JE sequence.
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