The second eldest boy is four years yonger than me.
The second eldest girl, who i get on with really well, is three years yonger than the eldest girl.
The eldest boy is four years younger than the eldest girl, and three years older than the youngest boy.
We all have the same parents.
If the second eldest girl is nineteen years old, how old am I?
Reread the information in the question and draw a diagram to work out everyone's ages.
Start with the second eldest girl, who we know is nineteen, and work from there.
There are three years between the second eldest girl and the eldest girl, which means the eldest is twenty-two.
Continuing on from hint two...
The eldest boy is four years younger than the eldest girl, which means that he must be eighteen.
Continuing on from hint three...
The eldest boy is three years older than the yongest boy, which means that the youngest boy must be fifteen.
So how old is the person posing the question?
Answer for 'Happy Families'
The answer is '19'.