I am emailing to ask for some help in identifying "trick questions" in mathematics.
A mathematics question/exercise/task is said to be a "trick question" if the reasoning required to solve it is applicable only to the solution of that question.
I am having some difficulty in identifying "trick questions". For example, the task "Expand (x-a)(x-b)(x-c)...(x-z)" felt to me originally to require a trick. But, on reflection, the reasoning is precisely that needed to construct Lagrange polynomials (HINT!).
Can anyone identify a trick question? I'm struggling to do so.