Test your knowledge of taxicab geometry, triangular numbers, the golden ratio and more.

In fact, for years students were told not to explain their answers, but to show their work, and if presented in a clear and organized manner, the math contained in this work was considered to be ...

Now, all of that work is automated, but at the time, in the era of the space race, people doing that work was extremely important. Being able to do the math and understand what’s going on sets ...