#### Arithmetic

- Integers
- Divisibility Tests
- Decimals
- Prime factorization
- Divisible only by itself and 1
- 1 is not a prime number
- Factor trees
- Positive divisors
- List of all possible factors for number
- Remainder
- Part of the number that is left over
- EX: 8/3 = 2 w/ remainder 2
- Absolute values
- Mixed numbers and improper fractions
- Reciprocal
- 1 divided by the number
- Product of number and its reciprocal is always 1
- Factorials
- N! => Product of all numbers from 1 to N
- 0! = 1
- Simplifying factorials
- Percentages
- Ratios

#### Powers and Roots