Zane's age is
13 his brother's age now. In 15 years' time, his age will be
34 that of his brother's. How old is Zane now?
|
Zane |
Zane's brother |
Difference |
Before |
1x1 = 1 u |
3x1 = 3 u |
2x1 = 2 u |
Change |
+ 15 |
+ 15 |
|
After |
3x2 = 6 u |
4x2 = 8 u |
1x2 = 2 u |
The difference in the age between Zane and Zane's brother remains unchanged. Make the difference in age the same. LCM of 2 and 1 is 2.
Increase in the age of Zane
= 6 u - 1 u
= 5 u
5 u = 15
1 u = 15 ÷ 5 = 3
Zane's age now
= 1 u
= 1 x 3
= 3
Answer(s): 3