Yes Discrete mathematics involves set theory, logical reasoning, graph theory, mathematical logic and so on. With a good mathematical foundation and logical thinking ability, it will be relatively easy to learn mathematics by yourself. You can deepen your understanding and master related concepts and skills by reading textbooks, reference materials and doing exercises and topic exercises. As long as you have some perseverance and patience, make a reasonable study plan, keep a certain amount of study time and keep working hard every day, and keep a good attitude towards learning and stick to it, you can pass the discrete mathematics exam even if you study by yourself in Zhejiang.