Rael's age is
35 his sister's age now. In 12 years' time, his age will be
34 that of his sister's. How old is Rael now?
|
Rael |
Rael's sister |
Difference |
Before |
3x1 = 3 u |
5x1 = 5 u |
2x1 = 2 u |
Change |
+ 12 |
+ 12 |
|
After |
3x2 = 6 u |
4x2 = 8 u |
1x2 = 2 u |
The difference in the age between Rael and Rael's sister remains unchanged. Make the difference in age the same. LCM of 2 and 1 is 2.
Increase in the age of Rael
= 6 u - 3 u
= 3 u
3 u = 12
1 u = 12 ÷ 3 = 4
Rael's age now
= 3 u
= 3 x 4
= 12
Answer(s): 12