Albert's age is
23 his brother's age now. 15 years ago, his age was
14 that of his brother's. How old is Albert now?
|
Albert |
Albert's brother |
Difference |
Before |
1x1 = 1 u |
4x1 = 4 u |
3x1 = 3 u |
Change |
+ 15 |
+ 15 |
|
After |
2x3 = 6 u |
3x3 = 9 u |
1x3 = 3 u |
The difference in the age between Albert and Albert's brother remains unchanged. Make the difference in age the same. LCM of 3 and 1 is 3.
Increase in the age of Albert
= 6 u - 1 u
= 5 u
5 u = 15
1 u = 15 ÷ 5 = 3
Albert's age now
= 6 u
= 6 x 3
= 18
Answer(s): 18