Wesley's age is
13 his sister's age now. In 9 years' time, his age will be
23 that of his sister's. How old is Wesley now?
|
Wesley |
Wesley's sister |
Difference |
Before |
1x1 = 1 u |
3x1 = 3 u |
2x1 = 2 u |
Change |
+ 9 |
+ 9 |
|
After |
2x2 = 4 u |
3x2 = 6 u |
1x2 = 2 u |
The difference in the age between Wesley and Wesley's sister remains unchanged. Make the difference in age the same. LCM of 2 and 1 is 2.
Increase in the age of Wesley
= 4 u - 1 u
= 3 u
3 u = 9
1 u = 9 ÷ 3 = 3
Wesley's age now
= 1 u
= 1 x 3
= 3
Answer(s): 3