RRB Technician Grade 3 previous year question
The sum of the present ages of a father and his son is 60 years. Five years ago from now, the product of numerical values of their ages was 525. Find the present age (in years) of the father.
Asked in RRB Technician Grade 3 (10 Mar 2026 Shift 2) · Quantitative Aptitude
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Correct answer: (B) 40
Let father's age = f and son's age = s, with f+s=60. Five years ago, (f−5)(s−5)=525. Substituting s=60−f and solving the resulting quadratic f²−60f+800=0 gives f = 40 or 20; since the father must be older, f = 40.
हिंदी में प्रश्न
एक पिता और उसके पुत्र की वर्तमान आयु का योग 60 वर्ष है। वर्तमान से पांच वर्ष पूर्व, उनकी आयु के संख्यात्मक मानों का गुणनफल 525 था। पिता की वर्तमान आयु (वर्षों में) ज्ञात कीजिए।
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सही उत्तर: (B) 40
मान लीजिए पिता की आयु = f और पुत्र की आयु = s, जहां f+s=60 है। पांच वर्ष पहले, (f−5)(s−5)=525। हल करने पर f²−60f+800=0 से f = 40 या 20 प्राप्त होता है; चूंकि पिता बड़े होने चाहिए, अतः f = 40।
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