RRB NTPC CBT-1 previous year question
The sum of two positive numbers is 31 and their product is 220. The positive difference between them is:
Asked in RRB NTPC 2026 — 17 June Shift 1 · Quantitative Aptitude
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Correct answer: (B) 9
The two numbers are roots of t2−31t+220=0, i.e. 11 and 20 (11*20=220, 11+20=31). Their positive difference is 20-11 = 9.
हिंदी में प्रश्न
दो धनात्मक संख्याओं का योगफल 31 है और उनका गुणनफल 220 el उनके बीच का धनात्मक अंतर ज्ञात कीजिए।
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उत्तर और व्याख्या देखें
सही उत्तर: (B) 26
दोनों संख्याएँ t2−31t+220=0 के मूल हैं, अर्थात 11 और 20 (11*20=220, 11+20=31)। उनका धनात्मक अंतर 20-11 = 9 है।
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