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Definitions from WordNet

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Rational Number

Description:

A rational number is a number that can be expressed as the quotient or fraction p/q of two integers, where p is the numerator and q is the non-zero denominator.

Senses and Usages:

Sense 1:

In mathematics, a rational number can be any number that can be expressed as a fraction. Examples of rational numbers include 1/2, 3/4, -5/2, and 7/1.

Sample sentence: The number -2.5 is a rational number because it can be expressed as -5/2.

Sense 2:

Rational numbers are often used in engineering and scientific calculations where accuracy and precision are important.

Sample sentence: When calculating the dimensions of a bridge, engineers rely on rational numbers to ensure accuracy.

Sense 3:

In local mathematics competitions, students often need to prove that a given number is rational or irrational.

Sample sentence: The students were challenged to prove that √2 is an irrational number and not a rational number.

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