When Mr Reggie is 42 years old, his nephew is 9 years old. In how many years will he be 4 times as old as his nephew?
| |
Mr Reggie |
His nephew |
Difference |
| Before |
42 |
9 |
33 |
| Change |
+ ? |
+ ? |
|
| After |
4 u |
1 u |
3 u |
The difference in the age between Mr Reggie and his nephew at first and in the end remains the same.
Difference in the age between Mr Reggie and his nephew
= 4 u - 1 u
= 3 u
3 u = 42 - 9
3 u = 33
1 u = 33 ÷ 3 = 11
Number of years' time so Mr Reggie will be 4 times as old as his nephew
= 11 - 9
= 2
Answer(s): 2
