Number Basics

Question	Answer
Definition of a Real Number	All numbers including: Integers Rational Numbers Irrational Numbers
Definition of an Integer	A whole number that can be either positive or negative e.g +2 and -1
Definition of a Rational Number	Is a Real Number that can be written as a fraction and terminates or is recurring e.g. 1/8
Definition of an Irrational Number	An Irrational Number is a real number that cannot be written as a simple fraction, and the decimal value does not recur. e.g. pi
BIDMAS	Brackets Indices Division Multiplication Addition Subtraction
The Sum of Numbers	The Addition of numbers
The Product of Numbers	Numbers multiplied together e.g. 9 x 8
A Difference of two Numbers	The Difference is calculated by Subtracting one number from another e.g. 9 - 7
The Quotient of a Number	The result of dividing one number by another e.g. 9/3
Definition of a Prime Number	An integer greater than 1 whose only factors are 1 and itself
Definition of a Composite Number	An integer greater than 1 that isn’t a prime number.
Lowest Common Multiple	The lowest (or least) common multiple (LCM) of two or more integers is the smallest positive integer that is a multiple of all of them. For example, the lowest common multiple of 4 and 6 is 12
Highest Common Factor	The highest common factor (HCF) of two or more integers is the largest positive number that is a factor of all of them. For example, the highest common factor of 24 and 30 is 6

Resource summary

	Created by Martin Everton almost 10 years ago