Today's #dailymaths CHALLENGE PROBLEM. Problems are taken from the Mathematics 2020 calendar. Each day's problem is posted at 2am Eastern/7am London. Previous day's solution is added a few hours later. Guest mathematician posts welcome; DM if interested! 
Yesterday's problem with a special series of answers! The answer is as simple as checking a list of the ten problems Hilbert revealed on August 8, and seeing that the Riemann is #8. But what about those problems? Why are they so special, and what do they mean? Keep reading!
Two professors, one retired and one current, wrote plain-English explanations of some of the Hilbert problems for us. Here is the first, problem #1, explained by @JohnsonFido.
The second Hilbert problem, explained by Dr. Blake Winter of @MedailleCollege.
The seventh Hilbert problem, explained by Dr. Blake Winter of @MedailleCollege.
The eighth Hilbert problem, explained by @JohnsonFido. The Riemann is one of the most famous unsolved mathematical problems ever and this explanation is fantastic!
