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Is 1.121221222122221... rational or irrational?
1.121212121212...is rational. It is a repeating decimal and it is rational.
Is 0.318 an irrational number?
No. Any terminating or repeating decimal is rational.
Is .345 repeating an irrational or rational number?
Any repeating decimal digits (this includes repetition after a certain point, e.g. 2.4510101010...) is a rational number.
Is 5.68 rational or irrational?
5.68 is rational. All decimal numbers that terminate, or end in one or more repeating digits are rational numbers.
How do you know if a decimal is rational or irrational?
A decimal is rational if it:either ends and doesn't go on forever; ORit is a repeating decimal.A decimal is irrational if it goes on forever and ever and never stops without repeating.The number: 5.77777777 is rational because it goes on forever, REPEATING the same number (the digit 7).It can also repeat a group of numbers, like the number: 8.789789789789789789See how the "789" is REPEATING over and over again and never stops? That is a rational decimal!
