Pierre is 8 years older than Ken. 11 years ago, the sum of their age was 52. How old is Ken now?
| |
Pierre |
Ken |
Difference |
Total |
| Before |
1 u + 8 |
1 u |
8 |
52 |
| Change |
+ 11 |
+ 11 |
|
+ 22 |
| After |
1 u + 19 |
1 u + 11 |
8 |
2 u + 30 |
The difference in the age between Pierre and Ken remains unchanged.
Ken's current age = 1 u
Pierre's current age = 1 u + 8
Combined age of Pierre and Johny 11 years ago
= 1 u + 1 u + 8
= 2 u + 8
2 u + 8 = 52
2 u = 52 - 8
2 u = 44
1 u = 44 ÷ 2 = 22
Ken's current age
= 1 u + 11
= 22 + 11
= 33
Answer(s): 33
