High School

Solve this riddle:

- Zac is 18.
- The ratio of Zac's age to Ed's age is 2:1.
- Tim's age is \(\frac{2}{3}\) of Zac's age.

What is the difference between Ed's age and Tim's age?

Answer :

Zac's age to Ed's age is:

2:1

[tex]\begin{gathered} 18\cdot\frac{1}{2}=9-->\text{ Ed's age} \\ Tim^{\prime}s\text{ 2/3 Zac's age} \\ 18\cdot\frac{2}{3}=12\text{ --> Tim's age} \end{gathered}[/tex]

The difference between Ed's and Tim's age is:

12-9=3 years

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