Yes to all three.
Every integer is a rational number.
A rational number which is an integer can be simplified to a form in which the denominator is 1. That is not possible for a rational number which is not an integer.
Zero is a rational number and an integer.
A rational number is either an integer or a fraction.
It is all three.
Yes to all three.
A rational number which is an integer can be simplified to a form in which the denominator is 1. That is not possible for a rational number which is not an integer.
Every integer is a rational number.
It is a rational number, not an integer.
A rational number which is an integer can be simplified to a form in which the denominator is 1. That is not possible for a rational number which is not an integer.
It is not an integer but is a rational number.
A rational number.
It can be written as a fraction, so it is rational. It is not an integer, whole number or irrational.
Zero is a rational number and an integer.
A rational number is either an integer or a fraction.
Every integer (note spelling) is a rational number.