Understanding Project Logic

Question

I am going through the Python for DS and there's something I don't understand about how project problems are structured. So I get it that the code must solve all given test cases. But what I don't understand is why hidden test cases remain hidden after I get the code to correctly solve the first two test cases. Anyone could lift this mystery please?

Answer 1

Because some of the Code-Coach Problems want you to challenge your thinking!

Answer 2

So your answers explain the rationale but not the logic of it. I figured it out: the code must work for all possible cases that fit in the description of the requirement as outlined in the problem and not only in the specific example of the first shown test cases.