Solution to CD1:
Ali
|
Bala
|
Diff
in units
|
||
Now
|
3a
|
5a
|
2a
|
×3
|
In
2 years’ time
|
5b
|
8b
|
3b
|
×2
|
Since the difference in Ali and Bala’s
age is constant, we want to make 2a and 3b to be the same units.
The LCM of 2 and 3 is 6.
Ali
|
Bala
|
Diff
in units
|
||
Now
|
9c
|
15c
|
6c
|
|
In
2 years’ time
|
10c
|
16c
|
6c
|
In 2 years’ time, Ali’s age
increases by 1c, so
1c à 2
years
9c à 2 ×
9 = 18 years Ans: 18
years old
Solution to CD2: will be posted end of next week when more people have attempted it.
