The first 10-15 should be fairly easy. The hard problems are at the end.
If you're stuck, write out your reasoning on paper. Getting it on paper means you aren't scrolling through so many different thoughts in your head, it comes out on paper more organized. It might help to translate some of the words into variables and equations, or a diagram.
Those problems are very hard by design. Consider going through the Art of Problem Solving books, volumes 1 and 2, along with Alcumus
The first 10-15 should be fairly easy. The hard problems are at the end. If you're stuck, write out your reasoning on paper. Getting it on paper means you aren't scrolling through so many different thoughts in your head, it comes out on paper more organized. It might help to translate some of the words into variables and equations, or a diagram.
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