Jack's age is
35 his sister's age now. 35 years ago, his age was
14 that of his sister's. How old is Jack now?
| |
Jack |
Jack's sister |
Difference |
| Before |
1x2 =
2 u |
4x2 =
8 u |
3x2 =
6 u |
| Change |
+ 35 |
+ 35 |
|
| After |
3x3 =
9 u |
5x3 =
15 u |
2x3 =
6 u |
The difference in the age between Jack and Jack's sister remains unchanged. Make the difference in age the same. LCM of 3 and 2 is 6.
Increase in the age of Jack
= 9 u - 2 u
= 7 u
7 u = 35
1 u = 35 ÷ 7 = 5
Jack's age now
= 9 u
= 9 x 5
= 45
Answer(s): 45
