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Yes, it is.

Q: Is 18 an rational number

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It is a rational number

Yes, any number that can be expressed as a fraction is rational. Since 18 out of 2 is the same as 18/2, it is rational.

Yes - any whole number - even a negative number - is a rational number.

Sqrt(18/2) =Sqrt(9) =3 which is rational.

The number, in the form of a ratio, is 18/100.

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-18 is a rational number

It is a rational number

rational

Yes, any number that can be expressed as a fraction is rational. Since 18 out of 2 is the same as 18/2, it is rational.

yes it is an irrational numberNo because 18 is a rational number

No, because 3.6 can be expressed as a fraction in the form of 18/5 which is a rational number

Yes - any whole number - even a negative number - is a rational number.

Yes because any number that can be expressed as a fraction is a rational number

Sqrt(18/2) =Sqrt(9) =3 which is rational.

18 is the ratio of 18 to 1. It's completely rational.

The number, in the form of a ratio, is 18/100.

Yes.