# Is 18 an irrational?

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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.
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# Why is pi irrational?

Pi can't be expressed as a fraction (a ratio of two integers), which makes it irrational.. Another way to say it. . Pi (Ï) is an irrational number; it's trancendent. The mathematical proof that pi is irrational can be viewed by using the link to the Wikipedia article on exactly this topic. The ( Full Answer )

# Why do you call irrational numbers irrational?

Answer . Well, irrational doesn't mean "crazy" Ratios are fractions.. Rational numbers are really "ratio..." numbers. like 1/3 or 45/99 or 27736644/8867564, whatever.. Numbers that are not made by fractions are "non ratio" numbers (or Irrational), like e, pi, and lots more.. No 22/7 is not Pi ( Full Answer )

# What is irrational number?

An irrational number is a real number that cannot be expressed as a ratio of two integers. In decimal terms, it is a real number that has either a terminating decimal or an infinitely recurring decimal. This would apply whatever the integer base, such as binary, octal, hexadecimal.

# What are the irrational numbers?

Irrational numbers are numbers that cannot be expressed as a ratio of two integers or as a repeating or terminating decimal.

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

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

# When was Pi proven irrational irrational?

There were beliefs for pi being irrational since the 9th century. However, the first proof was given in 1768 by Johann Heinrich Lambert.

# What does irrationals mean?

Irrationals are numbers that cannot be expressed as a ratio of two integers, a and b where b is not zero, in the form a/b.

# Why are there irrational numbers?

Because there are numerical values which cannot be expressed as ratios of two integers. That is, there are numbers that are not rational.

# What an irrational number?

An irrational number is a number that can't be expressed by afraction having integers in both its numerator and denominator.

# What is rational and irrational?

A rational number is one that can be expressed as a ratio of two integers, a / b where b is not zero. An irrational number is a number that cannot be expressed in such a form.

# Is negative 18 rational or irrational?

-18 is the ratio of -18 and 1 ... nice and rational. Also the ratio of 18 and -1, of 36 and -2, of 180 and -10, etc.

# Is 3 irrational?

No. . 3 = 3 / 1 which is of the form a / b (with a & b integers) which is a rational number

# Is 1.68 irrational?

no. irrational numbers are square roots of numbers that aren't square, pi, and some other numbers. irrational means it never ends.

# Can ratios be irrational?

Yes. But if you have a ratio of two integers, the ratio will be rational by definition.

# What are rationals and irrationals?

A rational number is one that can be expressed as a fraction, with integer numerator and denominator. This includes all "normal" fraction, as well as integers. An irrational number is one that can not be expressed in such a way. This includes, for example, square roots of any natural number (excep ( Full Answer )

# Is -42.8 irrational?

-42.8 is rational. Rational numbers are numbers that can be written as a fraction. Irrational numbers cannot be expressed as a fraction.

# What do you do when your nose is irratated?

i got my nose pierced a month ago and it got infected so i used METHO the next day it was perfect. :) hope this helps

# Is -18 an irrational number?

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.

# Is 10.46 irrational?

it is not irrational. This is because there are two non irrational numbers that divide each other that are rational. So 10.46 is rational.

# Is 20 irrational?

20 is not irrational because it can be represented in the form a/b, where a and b are whole numbers and b is not 0.

# Is 88 irrational?

88 is not an irrational number. An irrational number can't be expressed in the form of p/q (p and q are integers). Here, 88 can be expressed in the form of p/q as 88/1 or 176/2. So, 88 is a rational number. Also, an irrational number is a real number that can't be expressed as terminating ( Full Answer )

# Is 9 irrational?

No, it is a real, rational number. It can also be called an integer, whole number, and natural number.

# What is irrational nos?

An irrational number is a real number that is not rational. A rational number is one that can be expressed as a ratio of two integers. An irrational number cannot be expressed in this way.

# What are the characteristic of irrational?

An irrational number cannot be expressed as a ratio of two integers. The decimal representation of an irrational number is a non-terminating and non-recurring.

# What are the numbers that are irrational?

They are real numbers that cannot be expressed in the form of a ratio of two integers.

# What does irrational meen?

In math, it means any number that can't be written as one whole number divided by another whole number.

# Is -4.5 irrational?

-4.5 is rational. Rational numbers are numbers that can be written as a fraction. Irrational numbers cannot be expressed as a fraction.

# Is 00000050005005 irrational?

00000050005005 is rational. Rational numbers are numbers that can be written as a fraction. Irrational numbers cannot be expressed as a fraction.

# Is -7.2 irrational?

-7.2 is rational. Rational numbers are numbers that can be written as a fraction. Irrational numbers cannot be expressed as a fraction.

# What is an irrational num?

An irrational number is a real number that is not ration. That is, it is a real number than cannot be expressed as a ratio of two integers: that is, as a/b where b is not zero.

# Is -2.5 irrational?

-2.5 is rational. Rational numbers are numbers that can be written as a fraction. Irrational numbers cannot be expressed as a fraction.

# How do you spell irratable?

No. The correct spelling is " irritable ." . Having or showing a tendency to be easily annoyed or madeangry. . (of a bodily part or organ) Abnormally sensitive. .

# Is 18 a real number Is it raional or irrational?

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

# Can a integer be irrational?

yes it can be i had it on a test and got it right Answer: No, integers cannot be irrational. Any number that is rational is, by definition, not irrational. Any number that can be expressed as a fraction composed of integers is rational. All integers can be expressed as a fraction (and thus ar ( Full Answer )

# What are irrational numbers?

Numbers that can't be expressed as fractions An irrational number is any real number that cannot be expressed asa ratio a / b , where a and b areintegers, with b non-zero, and is therefore not a rationalnumber. This means that an irrational numbe r cannot berepresented as a simple fraction. ( Full Answer )

# Is 18 rational or irrational?

18 is rational. Rational numbers are numbers that can be written as a fraction. Irrational numbers cannot be expressed as a fraction.

# What an irrational number is?

\n. An irrational number is a number that cannot be expressed as a fraction such as pi

# Is 16 an irrational?

No. 16 = 16 / 1 which is of the form of 'one whole number' over 'another whole number' which is the form of a rational number.

# Is an irrational number times an irrational number always irrational?

The square root of 2 is irrational, yet the product of it with itself is 2. So the answer is no.

# 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 negative 18 over 6 an irrational number?

No. It is -3 and can be written as a fraction, so it is rational.

# Is an irrational number?

Any real number which cannot be expressed as a ratio of two integers is an irrational number.

# What is rational and what is irrational?

A rational number can be expressed as a fraction whereas an irrational number can't be expressed as a fraction.

# Is 14.142 irrational?

No because it can be expressed as a fraction in the form of 7071/500 in its lowest terms and so therefore it is a rational number

# Is .75 irrational?

No, because it is a rational number that can be expressed as a fraction in the form of 3/4

# Is 31.6 irrational?

No because 31.6 is a rational number that can be changed into a fraction if required.

# Is 0.22 irrational?

No, 0.22 is not irrational because it can be expressed as afraction in its simplest form as 11/50 and so therefore 0.22 is arational number.

# Is 5.4 irrational?

No because 5.4 is a rational number that can be expressed as a fraction in the form of 27/5

# If Dividing a irrational number by an irrational will be a irrational?

Yes normally but if both irrational number are the same then the quotient will be 1

# Is 19 irrational?

No because 19 is a whole number which means that it is a rational number