Summary: In our everyday lives we are commonly exposed to situations that require using logic and creative thinking. Their developing is natural to mathematical education and is often reflected into questions in the field of recreational mathematics. This paper is devoted to a logic question whose solution is largely dependent on the ability of a solver to interpret information from the assignment. Situations, where interpretation is ambiguous, force the solvers to think deeper; when these are accompanied by discussions, they are usually very productive and can even bring a whole new perspective to the question.