Hello,
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You haven't mentioned any examination name. But let it be I will help you out with the concept about what actually happens.
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You will find difficult question in 2 circumstances.
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First, when you haven't done your preparation perfectly. When you don't complete the syllabus.
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Second, when you don't understand the question. Sometimes what happens is,you know the answer but you will be unable to understand the question because the question is jumbled. It just waste your time. And one who gets out of it is an Topper.
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So, while you You prepare for examination, try yourself by jumbling the questions and solving them. Try to attempt new concept questions. And complete your preparation perfectly.
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Try this out. Hope you will of find any difficulty in the Futher examination.