Need expert advice on doing it as simply as possible.

What Jerry gives you is a good start, but I think you need some additional triggers to test that tue exists as an answer, that wed exists as an answer, and that thu exists as an answer. Otherwise, entering tue for 3, 4, and 5 will result in getting the question correct, without using wed or thu.

I envision three T/F variables, tuePresent, wedPresent, and thuPresent, all set to an initial value of F.

Then these triggers:

6. If code 3 = "tue", set tuePresent = True.

7. If code 3 = "wed", set wedPresent = True

8. If code 3 = "thu", set thuPresent = True.

Repeat all three for  code 4, and 5.

9.I f T/F = True, then if tuePresent = True AND wedPresent = True, AND thuPresent = True, set T/F = TRUE, else set T/F = False

Jerry's triggers will allow them to be entered in any order, while these will require that all three are used.