Rational or Irrational?

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What is a rational number?

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A rational number is any number that can be expressed as the quotient or fraction of two integers, where the denominator is not zero.

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What is an irrational number?

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An irrational number is a number that cannot be expressed as a simple fraction; it cannot be written as a ratio of two integers.

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Is 3.1415141514151415... rational or irrational?

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Rational (it can be expressed as a fraction).

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Is 6.8989898989... rational or irrational?

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Rational (it can be expressed as a fraction).

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Back

Rational (it is a fraction of two integers).

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Rational (it is a fraction of two integers).

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Irrational (the square root of 2 is irrational).

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Undefined (division by zero is not allowed).

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Rational (it is a fraction of two integers).

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Irrational (it cannot be expressed as a fraction).