Flynn's age is
15 of his grandfather's. His grandfather will be 52 years old in 2 years' time. In how many years' time will Flynn's age be
35 that of his grandfather's?
| |
Flynn |
His grandfather |
Difference |
| Before |
1x1 =
1 u |
5x1 =
5 u |
4x1 =
4 u |
| Change 1 |
+ 2 |
+ 2 |
|
| After |
|
52 |
|
| Change 2 |
+ ? |
+ ? |
|
| After 2 |
3x2 =
6 u |
5x2 =
10 u |
2x2 =
4 u |
The age difference between Flynn and his grandfather remains unchanged.
LCM of 4 and 2 is 4.
5 u + 2 = 52
5 u = 52 - 2
5 u = 50
1 u = 50 ÷ 5 = 10
Number of years' time when Flynn's age will be
35 that of his grandfather's age
= 6 u - 1 u
= 5 u
= 5 x 10
= 50
Answer(s): 50
