Definitions & Terms
Maths: Edexcel IGCSE Higher, topic 1.1.5
Definitions of Whole Numbers
You should understand the following terms: odd, even, prime, factor, multiple, common factor, common multiple, square, cube, and root.
Odd, even and prime numbers
- An odd number is any whole number which has one as a remainder when it is divided by two.
- An even number is any whole number which can be divided by two without a remainder.
- A prime number is any whole number which can only be divided by 1 and itself.
Factors and multiple
- A factor is a number that, when multiplied with another number, gives a new number.
- A multiple is a number that can be divided by another (smaller) number several times with no remainder.
Square and cube numbers
- A square number is the product of a number which is multiplied by itself.
- A cube number is the product of a number which is multiplied by itself, and then multiplied again by itself.
Root numbers
- A square root is the quotient of a number multiplied by itself.
- A cube root is the quotient of a number multiplied by itself and again by itself.
Factors
Factors are numbers that divide exactly into another number. What are the factors of 8?
Multiples
Multiples are a bit like the times tables. For example - what are the first 5 multiples of 4?
Test yourself on Definitions & Terms
What do we call any whole number which can only be divided by 1 and itself?
What do we call the product of a number which is multiplied by itself?
Which of these is a factor of 16?
Which of these is a factor of 28?
Which of these is a factor of 45?