The trigger to select the "Incorrect" button has multiple conditions. Those are connected with "and." That means that every condition must be met, or the trigger won't run. Thus, if the user enters even 1 correct number, that trigger won't run, neither of the "answer" buttons will be selected, and the program will give the "Invalid answer" message.
Change the "and" connectors to "or," and the slide will work. (And welcome to the very large club of folks who have made that mistake. 😄)
FYI: A simpler option would be to use just one trigger to check the variable values. If all of the values = the appropriate number, select the "Correct" button. Add an "Else" action to select the "Incorrect" button.
BTW, it would be much simpler to troubleshoot if you gave every object a meaningful name.
Also note that your text-entry fields aren't in the proper Focus Order. That would be very confusing/frustrating for anyone using the keyboard to move through them. (Custom Focus Order in Storyline 360 - E-Learning Heroes (articulate.com) )
