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Irrational Numbers. All numbers that are not rational are considered irrational. An irrational number can be written as a decimal, but not as a fraction. An irrational number has endless non-repeating digits to the right of the decimal point.

1. No (Is the multiples of Pi)
2.Yes
3. no
4. Yes 

Meltedcupcake
A number is rational if it can be written as a fraction. That would basically be any number that is terminating or is a whole number. However, numbers with repeating decimals are also rational numbers
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