micro:bit python code.

How to make random math game on micro:bit? When the maths questions is already generate with the answers, I want codes that the user can press either as 'a' is saying that is it correct whil 'b' is saying that it is wrong answer?

mainly what to put in the code here? also how to generate a random answer?

"if button_a.was_pressed():

???

if button_b:was_pressed():

???"