# Is 40 a rational or irrational number?

The number 40 is a rational number. According to Wolfram Research's Math World, a rational number is any number that can be expressed as the ratio of two integers. The integers are represented by a...
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http://www.answerbag.com/q_view/2240510

## How to Determine if a Number Is Irrational?

The history of irrational numbers begins with a murder. Legend attributes the discovery of the square root of two, an irrational number, to the Greek philosopher Hippasus. When his teacher Pythagor...
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http://www.ehow.com/how_8296432_determine-number-irrational.html

## What is the most famous irrational number?

Pi is the most famous irrational number. The constant value cannot be represented as a fraction of two integers and is most commonly rounded to 3.14. Pi is used in many mathematical formulas, parti...
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http://www.answerbag.com/q_view/2146732

## Are irrational numbers placed on the number line?

An irrational number cannot be expressed as a ratio of two integers. An integer is a negative or positive whole (non-fraction) number or zero. Thus, 2.5 is rational because it can be written as 5/2...
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http://www.answerbag.com/q_view/1996627

## How to Find the Square Root of an Irrational Number?

Irrational numbers are numbers that cannot be expressed as a simple fraction. For example, pi, which has an approximate value of 3.14159, is an irrational number because although pi is often expres...
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http://www.ehow.com/how_8232389_square-root-irrational-number.html