No matter how much you revise, there's always, always going to be at least one exam question which strikes the fear of God into you.
But what to do when you're faced which such a question? Take a leaf out of Jackie's book, and just get rid of it.
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If you don't have Tippex to hand, perhaps scribbling it out will suffice, or possibly just tearing the whole question out completely? Maybe you can give us some feedback once you've tried it..