Eric's age is
35 his brother's age now. In 18 years' time, his age will be
34 that of his brother's. How old is Eric now?
|
Eric |
Eric's brother |
Difference |
Before |
3x1 = 3 u |
5x1 = 5 u |
2x1 = 2 u |
Change |
+ 18 |
+ 18 |
|
After |
3x2 = 6 u |
4x2 = 8 u |
1x2 = 2 u |
The difference in the age between Eric and Eric's brother remains unchanged. Make the difference in age the same. LCM of 2 and 1 is 2.
Increase in the age of Eric
= 6 u - 3 u
= 3 u
3 u = 18
1 u = 18 ÷ 3 = 6
Eric's age now
= 3 u
= 3 x 6
= 18
Answer(s): 18