Making two text labels randomized ( but the second label needs to be the answer )

[Justsomedesigner]

Ok let me just begin that i am quite a noob on Iphone development , just look at my name an question , that tells you enough.Anyway let me tell you what my aim is in making this app.

My aim is to make an app where everytime you tap anywhere on the screen ,
the first text label appears and at the second tap the second label shows you the answer. When you tap again the first label changes to the next question and at the second label there is no text on it anymore and so on etcetera.
I whant the text to be randomized but the answer offcourse not.

I know how to make this app with just one label , but the way i whant it explained above i do not know...
Any help would be very much appreciated.