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level: Special number types

Questions and Answers List

Question	Answer
What is the name for a whole number, that can either be positive or negative?	Integer
Which of these is NOT an integer? 100, -10 or 1.5?	1.5
What is the name for a type of number that can be written as a fraction?	Rational number
What is the name for a type of number that cannot be written as a fraction?	Irrational number
What is the name for all types of numbers, of which there are an infinite amount?	Real numbers
What is the name for a number that has been multiplied by itself, for instance 5x5?	Square number
What is the name for a number that has been multiplied by itself, and then multiplied by itself again, for instance 10x10x10?	Cube number
What is the name for a number that cannot be divided by anything else, are mostly odd numbers, and only show in their own times table as 1 x itself?	Prime numbers
True or false, one is NOT a prime number?	TRUE
What number is the only even prime number?	Two
Not all odd numbers are necessarily prime numbers, why is this?	Some odd numbers can be divided by 2 or more
Which of these is NOT an prime number? 19, 21 or 23?	21
How would you describe each of the values in a certain numbers times table?	Multiple
What is the term used to describe a number that divides into another number exactly?	Factor
What is the term used to describe any prime numbers that can be multiplied together to reach a specific number?	Prime Factor