Irene is 5 years old. Her uncle is 29 years old. How old will Irene be when her uncle is five times her age?
| |
Irene |
Her uncle |
Difference |
| Before |
5 |
29 |
24 |
| Change |
+ ? |
+ ? |
|
| After |
1 u |
5 u |
4 u |
The difference in the age between Irene and her uncle 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
Irene's age when her uncle is five times her age
= 1 u
= 6
Answer(s): 6
