When Mr Tom is 22 years old, his nephew is 2 years old. In how many years will he be 6 times as old as his nephew?
| |
Mr Tom |
His nephew |
Difference |
| Before |
22 |
2 |
20 |
| Change |
+ ? |
+ ? |
|
| After |
6 u |
1 u |
5 u |
The difference in the age between Mr Tom and his nephew at first and in the end remains the same.
Difference in the age between Mr Tom and his nephew
= 6 u - 1 u
= 5 u
5 u = 22 - 2
5 u = 20
1 u = 20 ÷ 5 = 4
Number of years' time so Mr Tom will be 6 times as old as his nephew
= 4 - 2
= 2
Answer(s): 2
