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irrational numbers definition with example

Author

Emily Wong

Updated on June 16, 2026

Example: √2, √3, √5, √11, √21, π(Pi) are all irrational.

What are rational and irrational numbers with examples?

A rational number is the one which can be represented in the form of P/Q where P and Q are integers and Q ≠ 0. But an irrational number cannot be written in the form of simple fractions. ⅔ is an example of a rational number whereas √2 is an irrational number.

What are irrational numbers give 10 examples?

Following are the lists of irrational numbers:
List 1 – The Square Root of Primes: √2, √3, √5, √7, √11, √13, √17, √19 …List 2 – Logarithms of primes with prime base: log23, log25, log27, log35, log37 …List 3 – Sum of Rational and Irrational: 3 + √2, 4 + √7 …List 4 – Product of Rational and Irrational: 4π, 6√3 …

What is the simple definition of irrational?

Definition of irrational

(Entry 1 of 2) : not rational: such as. a(1) : lacking usual or normal mental clarity or coherence. (2) : not endowed with reason or understanding. b : not governed by or according to reason irrational fears.

Is 3.14 a rational number?

3.14 can be written as a fraction of two integers: 314100 and is therefore rational.

Is 2.6 an irrational number?

Answer: Yes 2.6 is a Rational Number. As rational numbers can be expressed as decimals values as well as fractions. The number can also be written as 26/10 which is the ratio of two integers.

What is rational number and irrational?

Rational numbers are numbers that can be expressed as a fraction or part of a whole number. (examples: -7, 2/3, 3.75) Irrational numbers are numbers that cannot be expressed as a fraction or ratio of two integers. There is no finite way to express them. ( examples: √2, π, e)

What is difference between rational and irrational number?

Answer: Numbers which can be expressed in a/b or fraction form is a rational number, a number which cannot be expressed in a ratio of two numbers is irrational numbers.

Is 16 an irrational number?

16 is not an irrational number because it can be expressed as the quotient of two integers: 16 ÷ 1.

Is 8 an irrational number?

Yes, 8 is a Rational Number. As rational numbers can be represented as decimals values as well as in the form of fractions. The number can also be written as 8/1 which is the ratio of two numbers.

Is 25 a irrational number?

Answer and Explanation: The number 25 is a rational number. It is a whole number that can be written as the fraction 25/1.

How many irrational numbers are there between 1 and 6?

As such between 1 and 6 too we have infinite irrational numbers. Irrational numbers in their decimal form are non-repeating and non-terminating numbers.

What means rational number?

rational number, in arithmetic, a number that can be represented as the quotient p/q of two integers such that q ≠ 0. In addition to all the fractions, the set of rational numbers includes all the integers, each of which can be written as a quotient with the integer as the numerator and 1 as the denominator.

Why pi is called irrational number?

Pi is an irrational number, which means that it is a real number that cannot be expressed by a simple fraction. That’s because pi is what mathematicians call an “infinite decimal” — after the decimal point, the digits go on forever and ever.

Is 3.27 a irrational number?

When a rational number is split, the result is a decimal number, which can be either a terminating or a recurring decimal. Here, the given number, 3.27 can be expressed in the form of p/q, and we can write 3.27 as 327/100. Hence, 3.27 is a rational number.

Is 3.1444 a rational number?

Option (d) 3.141141114 is an irrational number.