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

What should come in place of the question mark (?) in the given series?

401 400 397 392 385 ?

A
375
B
372
C
374
D
376
Result Summary
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APEDIA

RRB NTPC Graduate Tier 1
2025 • 09 Jun, 2025 • Shift-1
What should come in place of the question mark (?) in the given series?

401 400 397 392 385 ?
Correct Answer
376
Sequential Difference Analysis: We meticulously calculate the strict mathematical difference between each set of consecutive numbers in the provided sequence. 4......
💡 Analysis & Explanation
Sequential Difference Analysis
We meticulously calculate the strict mathematical difference between each set of consecutive numbers in the provided sequence. 401 to 400 constitutes a drop of 1 (-1). 400 to 397 constitutes a drop of 3 (-3). 397 to 392 constitutes a drop of 5 (-5). 392 to 385 constitutes a drop of 7 (-7).
Pattern Extrapolation
The derived differences form a clear, uninterrupted sequence of consecutive odd numbers being systematically subtracted: 1, 3, 5, 7. Logically, the next sequential odd number to be subtracted must be 9.
Final Calculation
Applying this extrapolated logic, we subtract 9 from the terminal number of the series: 385 - 9 = 376.
Conclusion
The mathematically sound number that completes the series is 376.