Cole's age is
14 his brother's age now. In 25 years' time, his age will be
23 that of his brother's. How old is Cole now?
|
Cole |
Cole's brother |
Difference |
Before |
1x1 = 1 u |
4x1 = 4 u |
3x1 = 3 u |
Change |
+ 25 |
+ 25 |
|
After |
2x3 = 6 u |
3x3 = 9 u |
1x3 = 3 u |
The difference in the age between Cole and Cole's brother remains unchanged. Make the difference in age the same. LCM of 3 and 1 is 3.
Increase in the age of Cole
= 6 u - 1 u
= 5 u
5 u = 25
1 u = 25 ÷ 5 = 5
Cole's age now
= 1 u
= 1 x 5
= 5
Answer(s): 5