Elijah is 4 years old now. His sister is 36 years older than him. How old will Elijah be when his age is
37 of his sister's age?
| |
Elijah |
His sister |
Difference |
| Before |
|
|
36 |
| Change |
+ ? |
+ ? |
|
| After |
3 u |
7 u |
4 u |
The difference in the age between Elijah and his sister at first and in the end remains unchanged.
Number of years that his sister is older than Elijah
= 7 u - 3 u
= 4 u
4 u = 36
1 u = 36 ÷ 4 = 9
Elijah's age when his age is
37 of his sister's age
= 3 u
= 3 x 9
= 27
Answer(s): 27
