 # Is 81 A Rational Number?

## Is 0 a rational number?

Yes, 0 is a rational number.

Since we know, a rational number can be expressed as p/q, where p and q are integers and q is not equal to zero..

## Which is the smallest irrational number?

root2The smallest irrational number is – root2 since 3+ root2 +(-root2)= 3+root2-root2=3( a rational number).

## What is not a real number?

Imaginary numbers are numbers that cannot be quantified, like the square root of -1. The number, denoted as i, can be used for equations and formulas, but is not a real number that can be used in basic arithmetic. You cannot add or subject imaginary numbers. Another example of an imaginary number is infinity.

## What type of number is I?

Imaginary Numbers When we square an imaginary number, it gives a negative result, which means it is a square root of a negative number, for example, √-2 and √-5. When we square these numbers, the results are -2 and -5. The square root of negative one is represented by the letter i, i.e.

## Is 81 rational or irrational?

The square root of 81 is 9. This means that the square root of 81 is a rational number.

## Is 81 a natural number?

81 (eighty-one) is the natural number following 80 and preceding 82….81 (number)← 80 81 82 →Roman numeralLXXXIBinary10100012Ternary100003Octal12188 more rows

## Is 81 a perfect square?

81 is a perfect square. Because 9 * 9 = 81.

## Is 0.55 a rational number?

The decimal 0.55 is a rational number. It is a terminating decimal and all terminating decimals are rational numbers since they can be expressed by a…

## Is 4.5 rational or irrational?

4.5 is a rational number, as it can be represented as 9/2. Many important numbers in mathematics, however, are irrational, and cannot be written as ratios.

## Is 3 a rational numbers?

Yes 3 is a rational number.

## Is 21.5 a irrational number?

21 is not an irrational number because it can be expressed as the quotient of two integers: 21 ÷ 1.

## Is 81 squared an irrational number?

The square root of 81 is a rational number if 81 is a perfect square. It is an irrational number if it is not a perfect square. Since 81 is a perfect square, it is rational number. This means that the answer to “the square root of 81?” will have no decimals.

## What is the smallest rational number?

01 Answer. 0 is the smallest rational number.

## Is 1 9 a rational or irrational number?

Example:NumberAs a FractionRational?1.757/4Yes.0011/1000Yes−0.1−1/10Yes0.111…1/9Yes2 more rows

## Is 2 0 an irrational number?

Irrationals aren’t merely “not rational”, they’re real numbers that aren’t rational. Since 10 doesn’t evaluate to a real number (or any kind of number at all, if you’re working in R), it’s neither rational nor irrational. It’s non-existent.

## What are the whole numbers from 1 to 100?

The first 100 whole numbers are 0, 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, 74, …

## Is 0.9 a rational number?

YES, nine tenths (0.9) is a rational number because 0.9 satisfies the definition of a rational number. … Other examples of rational numbers are: 1/2, 3/4, 22/7, 5 = 5/1, 2½ = 5/2, 0 = 0/1, and -.

## Is 0 7 is a rational number?

Answer. and rational number is written in the form of p/q , where q is not equal to the zero. so , it is not a rational number.

## Why is 6 a rational number?

Either way, -6 is a rational number, because it can be expressed as a fraction where the numerator and denominator are integers and the denominator doesn’t equal 0.

## Is 0.8 a rational number?

The decimal 0.8 is a rational number. … A rational number is defined as the quotient that results when one…

## Is 21 rational or irrational?

The number 21 is a rational number. It is an integer, or whole number, and all integers are rational numbers.