When Mr Pierre is 37 years old, his niece is 5 years old. In how many years will he be 5 times as old as his niece?
| |
Mr Pierre |
His niece |
Difference |
| Before |
37 |
5 |
32 |
| Change |
+ ? |
+ ? |
|
| After |
5 u |
1 u |
4 u |
The difference in the age between Mr Pierre and his niece at first and in the end remains the same.
Difference in the age between Mr Pierre and his niece
= 5 u - 1 u
= 4 u
4 u = 37 - 5
4 u = 32
1 u = 32 ÷ 4 = 8
Number of years' time so Mr Pierre will be 5 times as old as his niece
= 8 - 5
= 3
Answer(s): 3
