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