Perhaps ever time the answer is correct, put some code similar to this in an IF..then block

Will give you a score of the right answers; If you also need the number of incorrect answers, use a second set of blocks.
If you need to have a record of the correct and incorrect actual questions/answers; save the results to two Lists. On list called CorrectAnswers , the other called IncorrectAnswers. Use an IF..then statement to add a correct answer to the CorrectAnswers and add an Incorrect Answer to the IncorrectAnswers List. You should be able to display the results of the lists in two labels. There are other ways to do this.
Your friend will be the add items to list
list
item
block.
Now, perhaps, try some blocks? If you run in to issues, show us what you have so far with a screen capture png or jpg image and someone will provide advice.
Regards,
Steve