Hi everyone, Im Making a timestable application and i really need some help

I have a button that i have made to generate new questions. (Btn.NewQuestion)

I Also made another button that checks the question (Btn.CheckQuestion)

I would like a code that once a new question is generated ( or when the btn.NewQuestion is clicked) it would dissapear and the btn.CheckQuestion button would appear. Once that is clicked, the new question button would appear and so forth.

Thanks in advance