Brandon is 6 years old. His uncle is 40 years older than him. In how many years will Brandon's uncle be 5 times as old as Brandon?
| |
His uncle |
Brandon |
Difference |
| Before |
46 |
6 |
40 |
| Change |
+ ? |
+ ? |
|
| After |
5 u |
1 u |
4 u |
The difference in the age between Brandon and his uncle at first and in the end remains the same.
Difference in the age between Brandon and his uncle
= 5 u - 1 u
= 4 u
4 u = 40
1 u = 40 ÷ 4 = 10
The increase in age of Brandon and his uncle remains the same.
Number of years' time so Brandon's uncle will be 5 times as old as Brandon
= 10 - 6
= 4
Answer(s): 4
