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Today is Varun's birthday. One year, from today he will be twice as old as he was 12 years ago. How old is Varun today ?

20 years
22 years
25 years
27 years

Correct Answer: 25 years

Explanation:

Let Varun's age today = x years.

Then, Varun's age after 1 year = (x + 1) years.

Therefore x + 1 = 2 (x - 12) => x + 1 = 2x - 24 => x = 25.

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