Archie is 6 years old. His auntie is 33 years older than him. In how many years will Archie's auntie be 4 times as old as Archie?
| |
His auntie |
Archie |
Difference |
| Before |
39 |
6 |
33 |
| Change |
+ ? |
+ ? |
|
| After |
4 u |
1 u |
3 u |
The difference in the age between Archie and his auntie at first and in the end remains the same.
Difference in the age between Archie and his auntie
= 4 u - 1 u
= 3 u
3 u = 33
1 u = 33 ÷ 3 = 11
The increase in age of Archie and his auntie remains the same.
Number of years' time so Archie's auntie will be 4 times as old as Archie
= 11 - 6
= 5
Answer(s): 5
