When Mr Mark is 24 years old, his nephew is 2 years old. In how many years will he be 3 times as old as his nephew?
| |
Mr Mark |
His nephew |
Difference |
| Before |
24 |
2 |
22 |
| Change |
+ ? |
+ ? |
|
| After |
3 u |
1 u |
2 u |
The difference in the age between Mr Mark and his nephew at first and in the end remains the same.
Difference in the age between Mr Mark and his nephew
= 3 u - 1 u
= 2 u
2 u = 24 - 2
2 u = 22
1 u = 22 ÷ 2 = 11
Number of years' time so Mr Mark will be 3 times as old as his nephew
= 11 - 2
= 9
Answer(s): 9
