RRB NTPC (Undergraduate)18 Jun 2026Shift 2Algebra

The sum of two positive numbers is 32 and their product is 220. The positive difference between them is:

दो धनात्मक संख्याओं का योगफल 32 है और उनका गुणनफल (Product) 220 है। उनके बीच का धनात्मक अंतर ज्ञात कीजिए।

Answer और ExplanationAnswer and explanation

Answer: (B) 12

(a − b)2 = (a + b)2 − 4ab = 322 − 4 × 220 = 1024 − 880 = 144
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अंतर 12 है।
(a − b)2 = (a + b)2 − 4ab = 322 − 4 × 220 = 1024 − 880 = 144
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The difference is 12.

Source: RRB NTPC (Undergraduate) · 18 Jun 2026 · Shift 2। Solution: Prashant Sir, Vijayastra।Source: RRB NTPC (Undergraduate) · 18 Jun 2026 · Shift 2. Solution by Prashant Sir, from Vijayastra.