Pierre's age is
25 his cousin's age now. In 12 years' time, his age will be
23 that of his cousin's. How old is Pierre now?
| |
Pierre |
Pierre's cousin |
Difference |
| Before |
2x1 =
2 u |
5x1 =
5 u |
3x1 =
3 u |
| Change |
+ 12 |
+ 12 |
|
| After |
2x3 =
6 u |
3x3 =
9 u |
1x3 =
3 u |
The difference in the age between Pierre and Pierre's cousin remains unchanged. Make the difference in age the same. LCM of 3 and 1 is 3.
Increase in the age of Pierre
= 6 u - 2 u
= 4 u
4 u = 12
1 u = 12 ÷ 4 = 3
Pierre's age now
= 2 u
= 2 x 3
= 6
Answer(s): 6
