Multiples: Found by multiplying any number by positives integers
Factor: integers that multiply together to get another number
Prime: an integer with only 2 factors
Conjecture: a statement that might be true but is not proven
Expression: a maths sentence with a minimum of two numbers and at least one maths operation
HCF: Highest common factor (biggest factor two or more numbers share)
LCM: Lowest common multiple (the first time that times table of two or more numbers match)