Mr Jenson is 3 times as old as his nephew, Gabriel. 9 years ago, the ratio in the age of Mr Jenson and Gabriel was 9 : 2. Find Mr Jenson's current age.
|
Mr Jenson |
Gabriel |
Difference |
Before |
9x2 = 18 u |
2x2 = 4 u |
7x2 = 14 u |
Change |
+ 9 |
+ 9 |
|
After |
3x7 = 21 u |
1x7 = 7 u |
2x7 = 14 u |
The difference in the age of Mr Jenson and Gabriel at first and in the end remains unchanged. Make the difference in age the same. LCM of 7 and 2 is 14.
The increase in the age of Mr Jenson and Gabriel is the same.
Increase in Gabriel's age
= 7 u - 4 u
= 3 u
3 u = 9
1 u = 9 ÷ 3 = 3
Mr Jenson's current age
= 21 u
= 21 x 3
= 63
Answer(s): 63