Billy is 5 years old. His auntie is 44 years older than him. In how many years will Billy's auntie be 5 times as old as Billy?
| |
His auntie |
Billy |
Difference |
| Before |
49 |
5 |
44 |
| Change |
+ ? |
+ ? |
|
| After |
5 u |
1 u |
4 u |
The difference in the age between Billy and his auntie at first and in the end remains the same.
Difference in the age between Billy and his auntie
= 5 u - 1 u
= 4 u
4 u = 44
1 u = 44 ÷ 4 = 11
The increase in age of Billy and his auntie remains the same.
Number of years' time so Billy's auntie will be 5 times as old as Billy
= 11 - 5
= 6
Answer(s): 6
