How do I Check all Values on Array at Z at specific X and Y

Hey Construct 2 Lovers,

I'm working on a quiz game in which a have a set of 10 mini games from 5 diffrent professions. The game choose random mini game and profession and then prints 4 unique question from a set of dozens. I want to make a global Array with (X) 10 elements Width (10 minigames), (Y) 5 Height (5 professions), and push completed question into (Z) Depth.

My question is how will I check this Array on specific X, Y throghout whole Z's if contains a Number (already answered question in specific minigame(X) and type(Y).

Anyone has some ideas?

For loop:

blackhornet thanks dear friend I was going to post question about this. Thanks a million