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# What is a rational number or a irrational number?

## What is a rational number or a irrational number?

Answer: Numbers which can be expressed in a/b or fraction form is a rational number, a number which cannot be expressed in a ratio of two numbers is irrational numbers.

### What is meant by irrational number?

irrational number, any real number that cannot be expressed as the quotient of two integers. For example, there is no number among integers and fractions that equals the square root of 2. Each irrational number can be expressed as an infinite decimal expansion with no regularly repeating digit or group of digits.

#### Is 89 rational or irrational?

89 is a rational number because it can be expressed as the quotient of two integers: 89 ÷ 1.

What determines if a number is irrational?

In mathematics, an irrational number is any real number that cannot be expressed as a ratio a/b, where a and b are integers and b is non-zero. Informally, this means that an irrational number cannot be represented as a simple fraction. Irrational numbers are those real numbers that cannot be represented as terminating or repeating decimals.

What are some examples of irrational numbers?

The main example of an irrational number is a number that contains a square root. Therefore, √2 is an irrational number, as is 2√57. (Obviously, √4 is rational, because it is equal to “2,” a rational number.) Other examples of irrational numbers are pi(∏) and e, neither of which can be represented by a ratio of two integers.

## What are two examples of rational numbers?

Any rational number is trivially also an algebraic number. Examples of rational numbers include , 0, 1, 1/2, 22/7, 12345/67, and so on. Farey sequences provide a way of systematically enumerating all rational numbers.

### What are the properties of an irrational number?

Irrational numbers have the following properties: Switching: irrational numbers can be added or multiplied. Associative: they can be grouped. Closed: any irrational number added, subtracted, multiplied or divided will not always result in an irrational number.