  << Back to INDEX

The difference between rational and irrational numbers [Algebra]
posted February 3 2013 10:04.31 by Giorgos Lazaridis A rational number is any number that can be written as a ratio between two numbers (hence rational). For example, 1/8 is a rational number, which makes 0.125. Also, 1/3 is a rational number which makes 0.333333. The difference between 1/8 and 1/3 is that the number of digits of 1/8 is finite (0.125), while the number of digits of 1/3 is infinite. You can write as many "3" as you like after the decimal point up to infinity.

Another example of rational number is the 4/7. The result of this division is 0.571428571428571428571428... Again, it has infinite digits after the decimal point, BUT notice that there is a pattern. The digits "571428" are repeated.

Now you can understand the difference between rational and irrational numbers. An irrational number is a number that simply cannot be represented with a ration between numbers - an irrational number has infinite digits after the decimal point, but these digits do not appear any repeated pattern whatsoever. The most famous irrational number is the Pi...

 Share Tweet

You might also like... The Bystander effect [Psychology] Read Modify Write Problem with PIC Microcontrollers [Education] The science of lying [Psychology] 13 Misconceptions About Global Warming [Science] How airplane wings actually works [Science] This is how cats were really useful once... - [Random Knowledge #48] The Theory of Everything...A Little Bit Closer [Education] Curie temperature experiment [Education]

<< Back to INDEX

 Name  Email (shall not be published)  Website Notify me of new posts via emailWrite your comments below:BEFORE you post a comment:You are welcome to comment for corrections and suggestions on this page. But if you have questions please use the forum instead to post it. Thank you.                