Xylia is 4 years old. Her uncle is 37 years old. How old will Xylia be when her uncle is four times her age?
| |
Xylia |
Her uncle |
Difference |
| Before |
4 |
37 |
33 |
| Change |
+ ? |
+ ? |
|
| After |
1 u |
4 u |
3 u |
The difference in the age between Xylia and her uncle remains unchanged.
Difference in their age at first
= 37 - 4
= 33
Difference in their age in the end
= 4 u - 1 u
= 3 u
3 u = 33
1 u = 33 ÷ 3 = 11
Xylia's age when her uncle is four times her age
= 1 u
= 11
Answer(s): 11
