Daniel's age is
19 of his uncle's. His uncle will be 34 years old in 7 years' time. In how many years' time will Daniel's age be
25 of his uncle's?
|
Daniel |
His uncle |
Difference |
Before |
1 u |
9 u |
24 |
Change |
+ 7 |
+ 7 |
|
After |
|
34 |
|
His uncle's current age
= 34 - 7
= 27
9 u = 27
1 u = 27 ÷ 9 = 3
Daniel's current age = 3
The difference in the age between Daniel and his uncle remains the same.
Difference in the age between Daniel and his uncle
= 9 u - 1 u
= 8 u
= 8 x 3
= 24
|
Daniel |
His uncle |
Difference |
Before |
1 u |
9 u |
24 |
Change |
+ ? |
+ ? |
|
After |
2 p |
5 p |
3 p |
3 p = 24
1 p = 24 ÷ 3 = 8
Daniel's age when he will be
25 of his uncle's age
= 2 p
= 2 x 8
= 16
Number of years' time when Daniel's age will be
25 of his uncle's age
= 2 p - 1 u
= 16 - 8
= 8
Answer(s): 8