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 Varan's age today = x years.

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

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

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