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Q: Is 18 a real number Is it raional or irrational?

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It is a rational number

No. An irrational number cannot be expressed as a/b where a and b are integers, b not zero. 18 = 18/1 = 36/2 = -36/-2 etc.

18 and 20

irrational

As √10 is irrational, 18 + √10 is irrational.

Related questions

Yes it's a real number but it is an irrational number because it can't be expressed as a fraction.

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

The square root of 18 is an irrational number because it cannot be expressed as a fraction.

Yes

It is a rational number

It is neither because the square root of -18 is an imaginary number but the square root of 18 is irrational

No. An irrational number cannot be expressed as a/b where a and b are integers, b not zero. 18 = 18/1 = 36/2 = -36/-2 etc.

No. √324 = 18 = 18/1 = a rational number.

Rational.

18 and 20

irrational

sqrt(18) = 3*sqrt(2) is an irrational number.

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