There is the so-called [FCI test][1]. It contains a list of questions such that anyone who can speak will have an opinion. Based on the answers one can determine if the answerer knows elementary mechanics. I learned about this test from an interesting [lecture from Eric Mazur][2] describing an application of such a list.

It seems that there are no analogous tests in mathematics. Did I miss something?
 
Sergei Tabachnikov shared a couple of questions that might work:

 * One needs to peel potatoes. What is faster and why: peeling a pound of large or small potatoes?

 * Why does a reflection in a mirror interchange left and right, but not up and down?

 * Two people are walking down an escalator (that is moving down), counting their steps. Who will count more steps, the one who is moving faster or slower?

>**Could you share more questions of this type?**

Please make one question per answer.
The questions should not use any professional jargon; **no graphs no formulas**;
say, they could be asked in a kindergarten.
I think it is possible to find such question for Euclidean geometry; I am not sure about other branches of mathematics.


  [1]: https://en.wikipedia.org/wiki/Force_Concept_Inventory
  [2]: https://www.youtube.com/watch?v=WwslBPj8GgI