Bonus Content

Bonus content: The graphic nature of groups

In the main post, I mentioned that the set {0, 1, 2, 3, 4, 5} under the operation of addition modulo 6 is a group. What this means is that three…

Jul 12, 2023 •

Bonus content: The best denominations for coins

To an outsider, an annoying feature of the US dime coin is that it is impossible to tell just by looking at it that it is worth 10 cents.

Jul 7, 2023 •

Bonus content: The symmetry of musical key changes

Jul 1, 2023 •

#nojs-banner { position: fixed; bottom: 0; left: 0; padding: 16px 16px 16px 32px; width: 100%; box-sizing: border-box; background: red; color: white; font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol"; font-size: 13px; line-height: 13px; } #nojs-banner a { color: inherit; text-decoration: underline; } This site requires JavaScript to run correctly. Please turn on JavaScript or unblock scripts