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yes it is an irrational number
No because 18 is a rational number

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βˆ™ 7y ago
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βˆ™ 13y ago

No. If you can write the number on paper, it's rational.

-18 is the ratio of -18 to 1, and also the ratio of 18 to -1.

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Q: Is 18 an irrational number
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