Gabby is 5 years old. Her mother is 29 years old. How old will Gabby be when her mother is five times her age?
| |
Gabby |
Her mother |
Difference |
| Before |
5 |
29 |
24 |
| Change |
+ ? |
+ ? |
|
| After |
1 u |
5 u |
4 u |
The difference in the age between Gabby and her mother remains unchanged.
Difference in their age at first
= 29 - 5
= 24
Difference in their age in the end
= 5 u - 1 u
= 4 u
4 u = 24
1 u = 24 ÷ 4 = 6
Gabby's age when her mother is five times her age
= 1 u
= 6
Answer(s): 6
