Valen's age is
23 his sister's age now. 6 years ago, his age was
13 that of his sister's. How old is Valen now?
| |
Valen |
Valen's sister |
Difference |
| Before |
1x1 =
1 u |
3x1 =
3 u |
2x1 =
2 u |
| Change |
+ 6 |
+ 6 |
|
| After |
2x2 =
4 u |
3x2 =
6 u |
1x2 =
2 u |
The difference in the age between Valen and Valen's sister remains unchanged. Make the difference in age the same. LCM of 2 and 1 is 2.
Increase in the age of Valen
= 4 u - 1 u
= 3 u
3 u = 6
1 u = 6 ÷ 3 = 2
Valen's age now
= 4 u
= 4 x 2
= 8
Answer(s): 8
