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Is 0.01011011101111011111 rational or irrational?
All numbers with a finite number of decimal digits are rational. Some that infinitely many decimal digits are rational as well. If you mean to repeat the pattern, adding one more "1" every time, then no, it is not rational - rational numbers repeat the SAME sequence of digits over and over (for example, 0.1515151515...), at least eventually (they may start with some digits that are not part of the repeating part, such as 3.87112112112...).
What is a decimal whose digits repeat in groups of one or more?
It is called a repeating decimal. It is also a form of a rational number.
How long would it take to recite all the known digits of PI?
How long would it take ypu to repeat/recite 50 billion digits or more.
Does pi ever repeat or end?
The decimal digits of Pi never end; they continue infinitely. The digits also will never repeat. These are characteristics of irrational numbers. Rational numbers have decimal fractions that either come to an exact end, or they fall at some point into an infinitely repeating pattern. 1/5 equals .25 exactly, and 1/3 has a repeating decimal fraction of .3333_. So far pi has been calculated out to at least 2.7 trillion decimal places, and since irrational numbers go on for infinitely many decimal places, we are nowhere near the end (and never will be, however hard we try). To keep things in perspective, by the time you reach 6 or 8 decimal places, you have pi to a tolerance good enough for almost any application we could ever imagine using on a practical level. If we ever need more decimal places than 8, we can go to the above calculation where there are a few waiting in the wings.
A decimal that has one or more digits that repeat forever?
1/3 = .33333... with the 3s repeating forever 1/7 = .142857142857... with the 142857 repeating forever A recurring decimal!! I just learnt it in school.
