Sean is 3 years old now. His sister is 14 years older than him. How old will Sean be when his age is
35 of his sister's age?
| |
Sean |
His sister |
Difference |
| Before |
|
|
14 |
| Change |
+ ? |
+ ? |
|
| After |
3 u |
5 u |
2 u |
The difference in the age between Sean and his sister at first and in the end remains unchanged.
Number of years that his sister is older than Sean
= 5 u - 3 u
= 2 u
2 u = 14
1 u = 14 ÷ 2 = 7
Sean's age when his age is
35 of his sister's age
= 3 u
= 3 x 7
= 21
Answer(s): 21
