Daniel's age is
17 of his uncle's. His uncle will be 46 years old in 4 years' time. In how many years' time will Daniel's age be
25 of his uncle's?
|
Daniel |
His uncle |
Difference |
Before |
1 u |
7 u |
36 |
Change |
+ 4 |
+ 4 |
|
After |
|
46 |
|
His uncle's current age
= 46 - 4
= 42
7 u = 42
1 u = 42 ÷ 7 = 6
Daniel's current age = 6
The difference in the age between Daniel and his uncle remains the same.
Difference in the age between Daniel and his uncle
= 7 u - 1 u
= 6 u
= 6 x 6
= 36
|
Daniel |
His uncle |
Difference |
Before |
1 u |
7 u |
36 |
Change |
+ ? |
+ ? |
|
After |
2 p |
5 p |
3 p |
3 p = 36
1 p = 36 ÷ 3 = 12
Daniel's age when he will be
25 of his uncle's age
= 2 p
= 2 x 12
= 24
Number of years' time when Daniel's age will be
25 of his uncle's age
= 2 p - 1 u
= 24 - 12
= 12
Answer(s): 12