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Reasoning
Alphanumeric Series
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RRB NTPC Graduate Tier 1 2025 Shift-1 📅 09 Jun, 2025

Which of the following letter-number clusters will replace the question mark (?) in the given series to make it logically complete?

NQ31, MP40, LO49, KN58, ?

A
JN66
B
JN67
C
JM67
D
JM66
Result Summary
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APEDIA

RRB NTPC Graduate Tier 1
2025 • 09 Jun, 2025 • Shift-1
Which of the following letter-number clusters will replace the question mark (?) in the given series to make it logically complete?

NQ31, MP40, LO49, KN58, ?
Correct Answer
JM67
First Letter Logic: Analyzing the sequence of the very first letters: N (14) -> M (13) -> L (12) -> K (11). The strict pattern is subtracting 1. The next initia......
Ref/Book : RRB NTPC Graduate Tier 1 2025
Ref. Subject Reasoning
Chapter -
Ref. Topic Alphanumeric Series
Pg. No -
💡 Analysis & Explanation
First Letter Logic ▼
Analyzing the sequence of the very first letters: N (14) -> M (13) -> L (12) -> K (11). The strict pattern is subtracting 1. The next initial letter must be J (10).
Second Letter Logic ▼
Analyzing the sequence of the second letters: Q (17) -> P (16) -> O (15) -> N (14). The pattern is identical, consistently subtracting 1. The following letter must be M (13).
Numerical Logic ▼
Tracking the numerical suffix attached to the letters: 31 -> 40 -> 49 -> 58. The mathematical progression exhibits a constant addition of 9. Therefore, 58 + 9 = 67.
Conclusion ▼
Merging these distinct patterns produces the final string JM67.
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