and Mrs. Jorkins have fifteen children, all born at intervals of one
year and a half. Miss Ada Jorkins, the eldest, had an objection to
state her age to the census man, but she admitted that she was just
seven times older than little Johnnie, the youngest of all.
What was Ada's age?
Do not too hastily assume that you have solved this little poser.
You may find that you have made a bad blunder!