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• Introduction; Problem-solving strategies: 1. Draw a diagram; 2. I can't do that, but I can do this; 3. Adding lines; 4. Solve a simpler problem; 5. Make changes to the problem; 6. Do you recognise the problem?; 7. What is a sensible answer?; 8. It depends how you look at it; 9. Work systematically; 10. If you don't know what to do, do something; Worked solutions: 1. Draw a diagram; 2. I can't do that, but I can do this; 3. Adding lines; 4. Solve a simpler problem; 5. Make changes to the problem; 6. Do you recognise the problem?; 7. What is a sensible answer?; 8. It depends how you look at it; 9. Work systematically; 10. If you don't know what to do, do something.

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• Introduction; Problem-solving strategies: 1. Draw a diagram; 2. I can't do that, but I can do this; 3. Adding lines; 4. Solve a simpler problem; 5. Make changes to the problem; 6. Do you recognise the problem?; 7. What is a sensible answer?; 8. It depends how you look at it; 9. Work systematically; 10. If you don't know what to do, do something; Worked solutions: 1. Draw a diagram; 2. I can't do that, but I can do this; 3. Adding lines; 4. Solve a simpler problem; 5. Make changes to the problem; 6. Do you recognise the problem?; 7. What is a sensible answer?; 8. It depends how you look at it; 9. Work systematically; 10. If you don't know what to do, do something.