Table of Contents

## Why is 18 a rational number?

18 is a rational number because **it can be expressed as the quotient of two integers: 18 xf7 1.**

## Why is 18 a irrational number?

The **square root of 18 is a non-repeating and non-terminating number. Hence, the square root of 18 cannot be represented as a ratio of two integers. Therefore, the square root of 18 is an irrational number.**

## What kind of number is 18?

Eighteen is **a composite number, its divisors being 1, 2, 3, 6 and 9. Three of these divisors (3, 6 and 9) add up to 18, hence 18 is a semiperfect number. Eighteen is the first inverted square-prime of the form pxb7q**2. In base ten, it is a Harshad number.

## Is 18 an irrational number Yes No submit?

**18 is not an irrational number because it can be expressed as the quotient of two integers: 18 xf7 1.**

## What makes a rational number?

Rational Numbers: **Any number that can be written as a ratio (or fraction) of two integers is a rational number. An integer can be written as a fraction by giving it a denominator of one, so any integer is a rational number.**

## How do you prove a number is rational?

The **square root of 18 is a non-repeating and non-terminating number. Hence, the square root of 18 cannot be represented as a ratio of two integers. Therefore, the square root of 18 is an irrational number.**

## How do you prove that Root 18 is irrational?

To decide if an integer is a rational number, we try to **write it as a ratio of two integers. An easy way to do this is to write it as a fraction with denominator one. Since any integer can be written as the ratio of two integers, all integers are rational numbers.**

## Is 18 a irrational number?

The number **18 is a rational number. Rational numbers are those that result when one integer is divided by another.**

## How do you prove that root 18 is irrational?

Sqr 18 **sqr (2*9) 3*sqr 2 and this is irrational number**

## What makes an irrational number?

18 is a rational number because **it can be expressed as the quotient of two integers: 18 xf7 1.**

## Is 18 a rational number?

The number 18 is **a rational number. Rational numbers are those that result when one integer is divided by another.**

## Is 18 an integer number?

**18 is a whole number. Whole numbers include all positive integers beginning with zero.**

## Is 18 a natural number Yes or no?

The natural numbers from 1 to 100 are 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, **18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, **

## Is 18 a real number?

Since, the whole numbers are set of real numbers that include zero and all positive counting numbers whereas, excludes fractions, negative integers, and decimals. For example 0,1,2,3,4,5,etc. Therefore, **18 being a part of real numbers is a whole number**

## Is an irrational number Yes or no?

The number **18 is a rational number. Rational numbers are those that result when one integer is divided by another.**

## How do you determine 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.**

## What makes a number rational or irrational?

Numbers that can be expressed as a ratio of two number (p/q form) are termed as a **rational number. Numbers that cannot be expressed as a ratio of two numbers are termed as an irrational number.**