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An irrational number is a number that can't be written as a fraction with whole numbers on top and bottom.
An irrational number written as a decimal never ends. BUT, some rational numbers
do the same thing, so you can't say that just because the decimal never ends, it
must be an irrational number.
Here are some rational numbers whose decimals never end:
1/3
1/6
1/7
1/9
1/11
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Is -0.575 an irrational number?
No An irrational number goes on forever with no repeating pattern.
Is pi a rational or irrational number and why?
irrational since it goes on forever 3.1415926535898... and on and on and on
Is the number pi that goes on forever with no repeating pattern rational or irrational?
pi is an irrational number. It can not be expressed as a ratio of two integers.
Is three an irrational number?
No, it is an integer, and therefor part of the rational number system. An irrational number is, if I remember correctly, a number that goes on forever, and doesn't have a pattern like π (pi)
Is 21 a rational number?
Yes. Any whole number is rational. An irrational number is one that goes on forever without repeating, like √2=1.414213...
