how can i change the iksamen Prizes images? please tell me

edit the quiz?

You can't.
In most quizzes, the Prizes larawan are the same, because they are generated sa pamamagitan ng Fanpop.
See the default prize listahan link
But, on some quizzes like the Twilight or the Harry Potter quiz, the prizes larawan are different because the F4 made those custom prize sets.

But, if you want to know madami about this see link artikulo (there may be something in there about changing the iksamen prizes larawan ;D).