Yes. A real number is any comprehendable number, from negative infinity to positive infinity. A rational number is any number that can be the answer to a division equation; an integer, fraction, or a decimal. An irrational number is any number that cannot be expressed as a fraction; such as exponents.
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Integers are rational. In the set of real numbers, every number is either rational or irrational; a number can't be both or neither.
Yes.
Every whole number is rational.
No. It could be a rational or an irrational
It is a irrational number. Because the square root of every imperfect square is irrational number.