## Number Dictionary

This is a fun little website that offers information on numbers from 1 to 1000000:

For example, I put in one of my favorite numbers, **144**, and saw four ways to write 144 as a **difference of squares **(always a useful little trick) and five ways to write it as the **sum of primes **(in case we were trying to verify **Goldbach’s conjecture**).

I find the **Mayan representation** of 144 really cool, and the **Roman Numeral** representation will make this website handy for crossword puzzles!

*Click here to see more in Resources.*

Who ever knew 23 was the difference of two squares, being 23 = 12^2 – 11^2. Well, I bet someone must have known. I guess I haven’t thought about it, although I love the number 23.

Just because of that absurd movie, I imagine.