Simon is 6 years old. His uncle is 36 years older than him. In how many years will Simon's uncle be 4 times as old as Simon?
| |
His uncle |
Simon |
Difference |
| Before |
42 |
6 |
36 |
| Change |
+ ? |
+ ? |
|
| After |
4 u |
1 u |
3 u |
The difference in the age between Simon and his uncle at first and in the end remains the same.
Difference in the age between Simon and his uncle
= 4 u - 1 u
= 3 u
3 u = 36
1 u = 36 ÷ 3 = 12
The increase in age of Simon and his uncle remains the same.
Number of years' time so Simon's uncle will be 4 times as old as Simon
= 12 - 6
= 6
Answer(s): 6
