Set Five Complete
2026-06-23
With question #50, we have now finished posting the fifth week of questions. I am posting a video of my solutions about once a month, which is available on my YouTube.
2026-06-23
2026-05-27
I've decided to slow down, we have quite a few problems now. We will keep the same structure but only post two questions per week.
2026-05-13
1) Right now the intention is to mimic the homework from a typical course. They may eventually occasionally be more challenging, but the idea is to have sixteen problems that represent what you would see in each course, then we repeat. (e.g. The 17th problem in each course will correspond to a typical "week one" problem.)
2) I have been streaming my solutions on Twitch (https://www.twitch.tv/zapwai) on Fridays. I write the work out there, then I post abbreviated solutions on the site. I also post my solutions video on YouTube. (I do occasionally make mistakes, to keep things spicy...)
2026-05-01
I have started streaming my solutions on Twitch once a week. A few users were watching me closely and helping me. =)
I figured it was easier to stream one session for one whole week of questions when I post my answers.
Funnily enough, sometimes I add a problem intended to make it interesting, and then weeks later when I answer it for the site I forget about my little tweak and make a mistake! Thank you again to fish-face for posting helpful solutions.
So this communal solutions idea has paid off already - people on stream caught me being a bit lazy with the definition of a group (ignoring the associative condition) and a user got an answer correct on the site where I did not. That will teach me to rush!
2026-04-15
Zapwai is posting solutions once a week, but that is not surprising, as he is me. However - big news - our first non-trivial user has joined, and even submitted a few solutions! Thank you to fish-face for joining and sharing some answers.
If these questions seem too easy for you, well, we're basically doing homework questions in order. These first ten questions were each from week one of a course. I am attempting to stick to a sixteen week schedule, meaning the sixteenth question will be the most advanced one in each topic. These are also undergraduate topics, meant to take a few minutes if you already know the material. Now and then they may be more challenging.
Another thought: We don't currently have a plotting system, or a way for people to draw graphs as part of an answer. I don't want an actual graphing calculator, but it might be useful to have some mechanism like desmos or tikz. I may trial something in a few months, there's no rush, but it's on my mind. Some precalculus and calculus questions would benefit from it.
If you have some feedback, questions, or bug reports, please contact me: zapwai+mc (at) gmail (dot) com
2026-03-31
I have long been a fan of Project Euler and the Perl Weekly Challenge.
Project Euler is a site that offers challenging questions to programmers and number theory enthusiasts. The Weekly Challenge is a place for programmers to stay sharp with a few tasks every week.
It occurred to me that a "weekly challenge" site aimed at mathematics students could be fun. At first it seemed fairly daunting and I didn't know where to begin.
The website does not validate your solutions, but you can view other user's submissions to see how you did. This allows us to keep some of the questions more open-ended, even something like "prove this result" could be a task.
I'll be posting a new problem almost every week day. (So if you're only interested in one class, that's a new problem every two weeks.)
2026-03-31
We post our first problem tonight. Many of these are homework questions from various textbooks, and we'll mostly go in order.
I had a loose plan to mimic a course, posting around 16 questions for a "full semester" before we start over with the stuff from chapter one.
Here are some references: