Factors are numbers that divide evenly into another number
Multiples are the numbers you get when you multiply a number by an integer
Prime Numbers are counting numbers other than one that are divisible only by 1 and themselves.
Composite Numbers are counting numbers, other than 1, that are not prime.
Greatest common factor or GCF is the greatest counting number of all the given counting numbers.
Least common multiple or LCM is the least common multiple of all the counting numbers.
A counting number is even if it is divisible by 2, if there is no remainder after the number has been divided by 2.
A counting number is odd if it is not divisible by 2, if there is a remining amount after being divided by 2.
A method to check if a counting number is divisible by another counting number without actually doing the division.