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Question 42
Arun is celebrating his birthday today. On his next birthday, he will be twice his age that was 12 years ago. How old is Arun today?
Solution
Let the present age of Arun = a
According to the problem,
$$a+1=2\left(a-12\right)$$
$$a+1=2a-24$$
$$a=25$$
$$\therefore\ $$Arun is 25 years old today
Hence, the correct answer is Option B
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