Liam's age is
14 his cousin's age now. In 30 years' time, his age will be
23 that of his cousin's. How old is Liam now?
|
Liam |
Liam's cousin |
Difference |
Before |
1x1 = 1 u |
4x1 = 4 u |
3x1 = 3 u |
Change |
+ 30 |
+ 30 |
|
After |
2x3 = 6 u |
3x3 = 9 u |
1x3 = 3 u |
The difference in the age between Liam and Liam's cousin remains unchanged. Make the difference in age the same. LCM of 3 and 1 is 3.
Increase in the age of Liam
= 6 u - 1 u
= 5 u
5 u = 30
1 u = 30 ÷ 5 = 6
Liam's age now
= 1 u
= 1 x 6
= 6
Answer(s): 6