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What is the definition of Rationial Numbers?
A rational number is any number that can be written as a ratio, or fraction, of 2 whole numbers.
What is the ratio of a number?
There is no such thing as the ratio of a number. You need two numbers to calculate a ratio. A ratio is the same as a quotient. For example, the ratio of 4 to 2 is the same as 4 divided by 2.
A number that can be expressed as a ratio of 2 integers?
Rational numbers.
Can every number be written as a fraction?
No, some numbers, eg sqrt 2, are irrational, which means they cannot be written as a ratio between two whole numbers. Some numbers are also transcendental, but you don't want to go there!
What is an irrational number and examples?
An irrational number is a number that cannot be written as a ratio of two whole numbers. That is, there are no two integers, X and Y (with Y>0) such that the number can be written as X/Y. Sqrt(2), pi, log(3) are examples of irrational numbers.
