In the given series, what should come in place of '?'? 90 91 ? 126 190 315
दी गई शृंखला में ‘?’ के स्थान पर क्या आना चाहिए? 90 91 ? 126 190 315
Answer और ExplanationAnswer and explanation
Answer: (C) 99
1
Differences में pattern देखिए। अंतर घन (cubes) हैं: 1³ = 1, 2³ = 8, 3³ = 27, 4³ = 64, 5³ = 125। दिए गए अंतर 126 - 99 (27), 190 - 126 (64), और 315 - 190 (125) इसी pattern में आते हैं।
2
91 से छूटी हुई संख्या तक का अंतर 2³ = 8 है, इसलिए छूटी हुई संख्या 91 + 8 = 99 है।
3
जाँच कीजिए: 99 + 27 = 126, जो सही है।
✓
उत्तर (c) 99 है।
1
Find the pattern in the differences. The gaps are cubes: 1³ = 1, 2³ = 8, 3³ = 27, 4³ = 64, 5³ = 125. The known gaps 126 - 99, 190 - 126, and 315 - 190 are 27, 64, and 125, which fit this pattern.
2
The gap from 91 to the missing term is 2³ = 8, so the missing term is 91 + 8 = 99.
3
Check: 99 + 27 = 126, which matches.
✓
The answer is (c) 99.
Source: RRB NTPC CBT-1 (Undergraduate) · 09 May 2026 · Shift 2। Solution: Prashant Sir, Kavach।Source: RRB NTPC CBT-1 (Undergraduate) · 09 May 2026 · Shift 2. Solution by Prashant Sir, from Kavach.