Mrs Soh is 43 years old and her nephew is 11 years old now. In how many years' time will Mrs Soh be thrice as old as her nephew?
| |
Mrs Soh |
Her nephew |
Difference |
| Before |
43 |
11 |
32 |
| Change |
+ ? |
+ ? |
|
| After |
3 u |
1 u |
2 u |
The difference in the age between Mrs Soh and her nephew remains unchanged.
Difference in their age at first
= 43 - 11
= 32
Difference in their age in the end
= 3 u - 1 u
= 2 u
2 u = 32
1 u = 32 ÷ 2 = 16
Number of years time that Mrs Soh will be thrice as old as her nephew
= 1 u - 11
= 16 - 11
= 5
Answer(s): 5
