Jane is 5 years old. Her mother is 32 years old. How old will Jane be when her mother is four times her age?
| |
Jane |
Her mother |
Difference |
| Before |
5 |
32 |
27 |
| Change |
+ ? |
+ ? |
|
| After |
1 u |
4 u |
3 u |
The difference in the age between Jane and her mother remains unchanged.
Difference in their age at first
= 32 - 5
= 27
Difference in their age in the end
= 4 u - 1 u
= 3 u
3 u = 27
1 u = 27 ÷ 3 = 9
Jane's age when her mother is four times her age
= 1 u
= 9
Answer(s): 9
