Mrs. Brown has four children, namely, Alice, Bill, Cathy, and
Dan.
Facts:
Two years ago,
Alice was twice the age of Cathy.
Four years ago, Bill was twice the
age of Cathy.
Two years from now, Alice would be twice the age of
Dan.
Three years ago, Cathy was twice the age of Dan. Mrs. Brown's current age is the sum of
all her children's current
age.
Solution:
The following table shows their ages which satisfies the
facts above.

Alice

Bill

Cathy

Dan

2 years ahead 
14 
12 
9 
7 
1 year ahead 
13 
11 
8 
6 
Now 
12 
10 
7 
5 
Last year 
11 
9 
6 
4 
2 years ago 
10 
8 
5 
3 
3 years ago 
9 
7 
4 
2 
4 years ago 
8 
6 
3 
1 
Current ages:
Alice 12, Bill 10, Cathy 7, Dan 5.
Mrs. Brown's current age is 34 which the sum of the ages of the 4
children, 12+10+7+5.
