My lecturer has informed us that tutorial questions will be insufficient, and has asked us to practice liberally from the textbook. Unfortunately, none of the exercises have answers supplied and I don't know enough people in the course to be able to trade answers. I've tried working at the questions, but I find that I'm making practically no progress with them. What should I do if I have trouble with a large number of them?
EDIT: The course is Numerical methods for PDEs