Theory test, advice?

How does one pass the theory test genuinely? the real questions are not exactly the same as the mock questions, i have went through all 1000 of them but it seems one requires actual understanding of the real questions to pass them, its a bit of a trick because while the questions are similar to the mock questions, the questions on the real test also have similar counter parts to each other and this is obviously a whole other test of itself that requires different educational material. for example, on the mock test you get similar questions to throw you off, same on the real test but keep in mind they are not exactly the same. what approach have you people taken that has made you pass? provide a detailed explanation id be pleased.