How old is Jane?
How old is Jane?
- Ten years ago, she was one-third as old as she is now.
- In 15 years, she will be twice as old as she is now.
Answer
Assume that the present age of Jane is x years.
Statement 1: Ten years ago, she was one-third as old as she is now.
Age of Jane ten years ago = 1/3 (present age of Jane)
x - 10 = x/3
3x - 30 = x
From this equation, you can find the value of x. Thus, statement 1 is sufficient to answer the question.
Statement 2: In 15 years, she will be twice as old as she is now.
Age of Jane 15 years after now = 2 × Present age of Jane
x + 15 = 2x
From this equation, you can find the value of x. Thus, statement 2 is sufficient to answer the question.
The correct option is D.