Having Trouble with making button invisible after click

Hello, Im not a programmer but Ive been working on a quiz game and Ive run into a roadblock. I want my widget buttons to be invisible after I click them so people dont go to the same question over and over again to boost their score. Its a Jeapoardy style game. My issue is that when I run my code either the code doesnt work and the button stays visible after its clicked or it just hides the button all the time. How can I fix this? Thank you for any help you can offer.