A real number is any value that can represent a quantity along a continuous line. This includes all the rational numbers (which can be expressed as the quotient of two integers, such as 1/2 or -3) and all the irrational numbers (which cannot be expressed as a simple fraction, such as the square root of 2 or pi). Real numbers can be classified into several categories: - **Rational Numbers**: Numbers that can be expressed as a fraction (e.g.
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