Are practical questions after each reading similar with exam?

Hi, I have finished the most practical questions after each reading. Most calculations are quite straightforward. You just need to use the information and variables they give to you to fit relevant formula. Many of them may take you only one step to get the answer. But, some people told me the calculation parts from the real exam are very complicate and some questions may take you 10 to 15 minutes. Many calculation may take you many steps. I am wondering is practical question the most exam-like?

Many aren’t; they’re designed to help you learn the material, not to simulate exam questions.

According to difficulty, real exam is between EOC and mock exam?