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Integers (whole numbers, without a decimal point, including negative whole numbers) are real numbers; they are rational; therefore they are not irrational.

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Q: Is 18 a real number Is it raional or irrational?
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Is the square root of 18 a real number?

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


Is 18 an irrational number?

NO!! Irrational Numbers are those where the decimal digits go to infinity AND there is no regular order in the decimal digits. pi = 3.141592.... is the most well known irrational number. as are the 'Square roots' od prime numbers;-# sqrt(2) = 1.414213.... sqrt(3) = 1.73205... sqrt(5) = 2.23606... However, such as numbers as 3.3333..... is NOT irrational, because the decimals are in regular order. Similarly 2.373737.... or 5 .678678678.... Are NOT irrational because the decimals are in a regular order. NB '....''' at the end of a decimal is the mathematical indication of recurring to infinity.


Is the square root of 18 a rational or irrational number?

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


Is the square root of negative 18 rational or irrational?

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


Is the square root of 18 a irrational number?

Yes


What is 4 18 is it rational or irrational?

It is a rational number


Is 18 an 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.


Is the square root of 324 irrational?

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


Is 18 rational or irrational?

irrational


What are the two closest integers for the irrational number 19?

18 and 20


What type of numbers is square root 18?

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


Is 18 divided by 71 an irrational number?

No. It can be written as a fraction, so it is rational.