Sarah went to get her driver’s licence. When asked her age, she replied: “My age today is three times what it will be three years from now minus three times what my age was three years ago.” How old is Sarah?
Answer
Sarah is 18.
If she is 18, then three times her age three years from now would be 213 (63). Three times her age three years ago would be 153 (45). Subtract 45 from 63 and she is 18.
