Knuth has a large range of problems in his text. He scales them all by difficulty on a log scale from 0 to 50. Things rated 00-05 might be a basic facts or arithmetic (What is 6! ?).
A set of problems in the 20s would be a good chunk of work, each taking about 20-30 minutes. By the time you get to 40's, you're dealing with problems that you could write a paper on. In the introduction, he demands proof of Fermat's Last Theorem as an example for 50.
A set of problems in the 20s would be a good chunk of work, each taking about 20-30 minutes. By the time you get to 40's, you're dealing with problems that you could write a paper on. In the introduction, he demands proof of Fermat's Last Theorem as an example for 50.