Numbers that can't be expressed as fractions are irrational.
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Decimal numbers that can't be expressed as fractions are irrational numbers
Pi belongs to the sets of real numbers, transcendental numbers and irrational numbers.
No. Although the count of either kind of number is infinite, the cardinality of irrational numbers is an order of infinity greater than for the set of rational numbers.
either irrational numbers, integers, integers, rational numbers, or whole numbers
yes * * * * * No. Rational and irrational numbers are two DISJOINT subsets of the real numbers. That is, no rational number is irrational and no irrational is rational.