Albert's age is
37 of his grandaunt's. His grandaunt will be 58 years old in 2 years' time. In how many years' time will Albert's age be
12 that of his grandaunt's?
| |
Albert |
His grandaunt |
Difference |
| Before |
3x1 =
3 u |
7x1 =
7 u |
4x1 =
4 u |
| Change 1 |
+ 2 |
+ 2 |
|
| After |
|
58 |
|
| Change 2 |
+ ? |
+ ? |
|
| After 2 |
1x4 =
4 u |
2x4 =
8 u |
1x4 =
4 u |
The age difference between Albert and his grandaunt remains unchanged.
LCM of 4 and 1 is 4.
7 u + 2 = 58
7 u = 58 - 2
7 u = 56
1 u = 56 ÷ 7 = 8
Number of years' time when Albert's age will be
12 that of his grandaunt's age
= 4 u - 3 u
= 1 u
= 1 x 8
= 8
Answer(s): 8
