Question 29
HardOriginal questionIbrahim is 32 years old. He is twice as old as Zoya was when Ibrahim was as old as Zoya is now. How old is Zoya now?
Show the answer and explanation
CorrectNot quiteAnswer D
Correct answer: D
Explanation
Let Zoya be now. Ibrahim was exactly years ago.
At that time Zoya was .
Ibrahim now is twice that: , so .
. Check: 8 years ago Ibrahim was 24 and Zoya 16; .
Worth noting
16 years is Zoya's age at that earlier moment, not now. Draw a two-row table (then / now) before writing any equation.
- Concept
- Nested 'when A was as old as B is now' statement
- Typical timeTypical
- 140 s
- Your timeYours
- —
Practise this chapter →
Ten questions from Ages & Problems on Numbers, at your own pace.