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If you can completely write a number, using digits, fractions and decimals,

then the number is rational. You appear to have done that.

Q: Is 27 a rational number or an irrational number?

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Irrational.

If you can completely write a number, using digits, fractions and decimals, then the number is rational. You appear to have accomplished that.

The product of a rational and irrational number can be rational if the rational is 0. Otherwise it is always irrational.

Yes, 27 is a real number. Real numbers include all rational and irrational numbers, and 27 is a rational number because it can be expressed as a fraction, 27/1.

No.A rational times an irrational is never rational. It is always irrational.

Related questions

No, it is rational.

5.4 = 5 2/5 = 27/5 so it is a rational number.

10.01 is a rational number

No it is rational. It can be written as 27/10.

The square root of 27 is an irrational number

Rational

It is a rational number.

is 34.54 and irrational or rational. number

It is a whole number and it can be written as a fraction, so it is rational.

it is a rational number but 4.121314..... is an irrational no

Irrational.

Such a product is always irrational - unless the rational number happens to be zero.