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UPSC 2001: In 1930, a person’s age was 8 times that of his son. In 1938, the father’s age became ten times that of his son’s age in 1930. The ages of the son and father in 1940 were, respectively.
(a)16 years, 58 years
(b)15 years, 50 years
(c)14 years, 42 years
(d)13 years, 34 years
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Not attemptedCorrect Answer: (c) 14 years, 42 years
Let the son’s age in 1930 be S; father’s age is 8S. In 1938, father’s age is 8S + 8 and equals 10 S, giving 2 S = 8 → S = 4. Son’s age in 1940 = 4 + 10 = 14 years; father’s age = 8 × 4 + 10 = 42 years. Hence option (c) 14 years, 42 years.
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Frequently Asked Questions
What is the correct answer to this UPSC 2001 Science & Technology question?▼
The correct answer is option (c): 14 years, 42 years. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Quantitative Aptitude question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 2001, GS Paper 1, as Question 145. It falls under Science & Technology > Quantitative Aptitude.
What is the difficulty level of this UPSC question?▼
This question is rated "moderate". It requires sound conceptual understanding of the topic.
How many UPSC Prelims questions have been asked from Quantitative Aptitude?▼
UPSC has asked 178 questions from Quantitative Aptitude (under Science & Technology) across multiple years. Visit the topic page to see the full list and year-wise trends.