When Mr Michael is 37 years old, his nephew is 4 years old. In how many years will he be 4 times as old as his nephew?
|
Mr Michael |
His nephew |
Difference |
Before |
37 |
4 |
33 |
Change |
+ ? |
+ ? |
|
After |
4 u |
1 u |
3 u |
The difference in the age between Mr Michael and his nephew at first and in the end remains the same.
Difference in the age between Mr Michael and his nephew
= 4 u - 1 u
= 3 u
3 u = 37 - 4
3 u = 33
1 u = 33 ÷ 3 = 11
Number of years' time so Mr Michael will be 4 times as old as his nephew
= 11 - 4
= 7
Answer(s): 7