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Q6 (CISF/2020) Miscellaneous & General Knowledge › Important Days, Places & Events

Last year the age of R was three times that of V. At present, the age of R is double that of V. How old is R ?

Result
Your answer: —  Â·  Correct: D

Explanation

To find the age of R, let the present age of V be x years. According to the problem, the present age of R is double that of V, so R = 2x.

Last year, their ages were (2x - 1) and (x - 1) respectively. The problem states that last year R's age was three times V's age:
2x - 1 = 3(x - 1)
2x - 1 = 3x - 3
3 - 1 = 3x - 2x
x = 2

Therefore, the present age of V is 2 years, and the present age of R is 2 × 2 = 4 years. Thus, option D is correct.

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