How to fix button clicked not updating but others do : <p>I'm making a math game. Every time I click a button a new question should appear with different results to choose from.</p>

<p>However every time I click the button which I think is the result it doesn't update the text but the others do.</p>

<p>See github: <a href="https://github.com/Combii/BrainTrainerSwift" rel="nofollow noreferrer">https://github.com/Combii/BrainTrainerSwift</a></p>

<p><a href="https://i.stack.imgur.com/XjnqB.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/XjnqB.png" alt="enter image description here"></a></p>
