 # Quick Answer: Is 2/3 A Rational Or Irrational Number?

## Is 2 √ 3 a rational or irrational number?

Since, a, b are integers, (a2 + b2)/2ab is a rational number.

√3 is a rational number.

It contradicts to our assumption that √3 is irrational….Thank you.Related Questions & AnswersWhat Does Asexual Reproduction MeanWhat Are The Limitations Of Wind Energy4 more rows.

## How do you tell if a number is rational or irrational?

A rational number can be defined as any number that can be expressed or written in the p/q form, where ‘p’ and ‘q’ are integers and q is a non-zero number. An irrational number on the other hand cannot be expressed in p/q form and the decimal expansion of an irrational number is non-repeating and non-terminating.

## Is 3 a real number?

The real numbers include natural numbers or counting numbers, whole numbers, integers, rational numbers (fractions and repeating or terminating decimals), and irrational numbers. The set of real numbers is all the numbers that have a location on the number line. Integers …, −3, −2, −1, 0, 1, 2, 3, …

## What is 2/3 as a real number?

23 is a rational number (i.e. a number which can be expressed as a fraction). Since any rational number is a real number 23 can be treated as both real and rational. So to sum it all up the number can be treated as both a rational number and a real number.

## Is 3.0 A irrational number?

3 is not an irrational number because it can be expressed as the quotient of two integers: 3 ÷ 1.

## How do you know if its rational or irrational?

To show that the rational numbers are dense: An irrational number is a number that is NOT rational. It cannot be expressed as a fraction with integer values in the numerator and denominator. When an irrational number is expressed in decimal form, it goes on forever without repeating.

## Is 3 a rational number?

Yes 3 is a rational number.

## Is 2/3 A irrational number?

Explanation: A number that can be written as a ratio of two integers, of which denominator is non-zero, is called a rational number. … 23 is a rational number.

## Why is 2/3 a rational number?

In mathematics rational means “ratio like.” So a rational number is one that can be written as the ratio of two integers. For example 3=3/1, −17, and 2/3 are rational numbers. The rational numbers are those which have repeating decimal expansions (for example 1/11=0.09090909…, and 1=1.000000… …

## Why is √ 3 an irrational number?

Then r2 is odd and 3r2 is odd which implies that q2 is odd and so q is odd. Since both q and r are odd, we can write q=2m−1 and r=2n−1 for some m,n∈N. … Therefore there exists no rational number r such that r2=3. Hence the root of 3 is an irrational number.

## Is 2020 a rational number?

Answer. Answer: 2020/2019 is definitely a rational number because it is expressed in the form p/q.

## Is 2.5 a rational number?

The decimal 2.5 is a rational number. All decimals can be converted to fractions. The decimal 2.5 is equal to the fraction 25/10.

## Is 2 square root 3 a rational number?

We can say that we truly know a rational number. WE ARE ABOUT TO SEE that the square root of a number that is not a perfect square—√2, √3, √46—is not a rational number.

## How do you prove √ 2 is irrational?

Let’s suppose √2 is a rational number. Then we can write it √2 = a/b where a, b are whole numbers, b not zero….A proof that the square root of 2 is irrational.2=(2k)2/b2b2=2k22 more rows

## Is 2 rational or irrational?

2 is a rational number because it can be expressed as the quotient of two integers: 2 ÷ 1.

## Is 321 a rational number?

321 is a rational number because it can be expressed as the quotient of two integers: 321 ÷ 1.

## Is 3 a whole number?

In mathematics, whole numbers are the basic counting numbers 0, 1, 2, 3, 4, 5, 6, … and so on. 17, 99, 267, 8107 and 999999999 are examples of whole numbers. Whole numbers include natural numbers that begin from 1 onwards.

## Is negative 3 a rational number?

−3 is negative so it is not a natural or whole number. … Rational numbers are numbers that can be expressed as a fraction or ratio of two integers. Rational numbers are denoted Q . Since −3 can be written as −31 , it could be argued that −3 is also a real number.

## Is 5 a irrational number?

Irrational numbers are the real numbers that cannot be represented as a simple fraction. It cannot be expressed in the form of a ratio, such as p/q, where p and q are integers, q≠0. For example, √5, √11, √21, etc., are irrational. …

## Is 8 a rational number?

A rational number is a number that can be written as a ratio. That means it can be written as a fraction, in which both the numerator (the number on top) and the denominator (the number on the bottom) are whole numbers. The number 8 is a rational number because it can be written as the fraction 8/1.

## Is 0.3333 a rational number?

0.3333 is both recurring and non terminating – it’s a rational number .