Integers (eg 5), rational numbers (eg 7/9), Irrational Numbers (eg sqrt(3), transcendental numbers (eg π).
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Natural numbers or Counting numbers Integers Rational numbers Irrational numbers
Complex numbers include real numbers, pure imaginary numbers, and the combination of those two.
They are whole numbers,counting numbers,integers,rational numbers,real Numbers,composite numbers,square numbers,positive numbers,2-digit numbers.
No. Negative four is a real number. All real numbers are also complex numbers, so it is a complex number (but it's real, not nonreal)
It is {sqrt(2), sqrt(3.7), pi, and e}.