How to: Start from Q11-Q19, then Q4-Q10, then Q1-Q3
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Store the grid in a Text Editor. When you encounter a troublesome question and its been more than 5mins without a clear idea of solution, update the question on the grid with an asterix and move on. Trust me, you do not want to waste additional 2mins on a question you will fail when you can answer another question in the same time!

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