No, there isn't. Please quote what other information is provided.
In fact my sister ran the data systems for a large trucking company. Her interview questions included "how many ping pong balls will fit in a semi-truck trailer?" She was looking for any kind of process to arrive at an answer. Most folks just flailed around, helpless because the question didn't include the answer in it (like so many test questions in school).
This is all about students being taught by rote, with right answers all neat and pat and solvable. Folks educated like that have a problem with questions like this one. Folks who can 'think outside the box' have no issue at all with uncertainty in the answer.
Similarly, folks posting here who can or cannot see that this question is interesting and solvable (do a degree). No, not by 'an answer' but by a variety of approaches.
I certainly couldn't have done that.
One of the answers was "must be an adult", which still sets bounds. That sounds like a much more reasonable answer for an 11 year old, while it sounds like you think it's reasonable to require a tighter range. Why?
Folks who can "think outside the box" can conceive of a world where "there is no answer to this question" is a meaningful response.