chridd » **Math**

- Numeral systems/Number representations: convert between various bases, Roman numerals, scientific notation, prime factorization, etc. (requires JavaScript)
- Numeral systems list: display a list of numbers in a specified range in various numeral systems (requires JavaScript)

- Number types calculator (perform calculations with complex numbers, quaternions, various types of infinity,
`p`-adic numbers, etc.) (requires JavaScript) - Unit converter (length, time, etc.) (requires JavaScript)
- Vector calculator (requires JavaScript)
- Function calculator (requires JavaScript)
- "Everything" formula (a.k.a. Tupper's self-referential formula) (requires JavaScript)
- Latitude/longitude / spherical coordinate distance (only an approximation, because the Earth is only approximately a sphere) (requires JavaScript)
- Kaufman decimal sorter: a generalization of repeated decimals (like 0.3333333…) from
*Math with Bad Drawings*(requires JavaScript) - Aztec diamond tiler: generates domino tilings of Aztec diamonds, as described in a Mathologer video (requires JavaScript)
- Number of ways of making change: based on a recent Mathologer video, this shows the number of ways of making change for a given amount (requires JavaScript)
- Permutations calculator: calculate the product of permutations expressed in cycle notation, and convert between cycle notation and two-line notation (requires JavaScript)

- Time zone converter (requires JavaScript)
- Date representation converter (requires JavaScript)
- Date anagrams: find dates like 2017-02-17 or 2017-07-12 where the date is the anagram of the year
- Another idea for abolishing time zones (which I don't expect to actually catch on)
- How to find the number of Friday the 13ths in a given year

- Math Finger Paintings, my final project in high school calculus (List)
- Yet another Monty Hall problem demo and Reverse Monty Hall (in Games) (requires JavaScript)