Multiplication and division Flashcards
What name is given to the result when a number has been multiplied by itself
A square number
What are 1, 2, 3, 4 and 5 cubed, respectively?
1, 8, 27, 64, 125
Give an example of a composite number?
12
What distinguishes 2 and 3 from 1, 4, 6 and 12 as factors of 12?
2 and 3 are the only prime factors of 12 [i.e. factors which happen to be prime numbers]
What is the definition of a prime number?
A number which has only two factors: 1 and itself?
What name is given to factors which occur when two numbers have factors that are the same e.g. when 1, 2 and 4 are factors of 8 and also factors of 12?
common factors
What is the definition of a square number?
The result when a number has been multiplied by itself
What are all the factors of the number 12?
1, 2, 3, 4, 6, 12
What name is given to the result when a number has been multiplied by itself three times, if by this we mean [number] x [number] x [number]?
A cube number
What name is given to a number which has only two factors: 1 and itself?
Prime
What are the first eight prime numbers?
2, 3, 5, 7, 11, 13, 17, 19
What name is given to a number which has more than two factors?
Composite
What is the definition of a cube number?
The result when a number has been multiplied by itself three times, if by this we mean [number] x [number] x [number]? (A pedant would say that the number has been multiplied by itself and then by multiplied by itself again, and that we should therefore say that it has been multiplied by itself twice.)
What is the definition of a factor?
a number that divides exactly into another number
What name is given to numbers which appear in more than one other number’s times table, for example 12 and 24 as they appear in both the 4 Times Table and the 6 Times Table
common multiples (of 4 and 6 in this case)
