The sign of a rational number does not depend on whether it is odd or even.
Only if the negative sign is associated with an even root. In that case, the number is neither rational nor irrational, but is imaginary.
Count the number of negative numbers. If this is an even number, the sign is + and if it is odd, the sign is -.
A negative sign, by itself cannot affect whether or not a number is rational.
Yes. Every even number is a rational number.
The sign of a number has no bearing on whether or not it is rational.
Count the number of negative values. If that number is even, the answer is positive and if it is odd, the answer is negative.
No.
No
No.
Every odd or even number is a rational number, and there are a lot more rational numbers besides those.
No, they can be rational or irrational. The sign of a number has nothing to do with it.
It is the number with the same magnitude (absolute value) and the opposite sign.