Yes, sometimes although a lot more often it is not.
Numbers cannot be rational and irrational at the same time.
No, a real number could also be a rational number, an integer, a whole number, or a natural number. Irrational numbers fall into the same category of real numbers, but every real number is not an irrational number.
Yes.
Any rational positive number is still rational when you make the same number negative.
None. A rational number is a number that can be written as the quotient of two integers where the divisor is not zero. An irrational number is a real number that cannot be written as the quotient of two integers where the divisor is not zero. Any given real number either can or cannot be written as the quotient of two integers. If it can, it is rational. If it cannot, it is irrational. You can't be both at the same time. The square root of -1 is not a real number and it cannot be written as the quotient of two integers, so it is neither rational nor irrational.
3.1214122144 is a rational number. Rational numbers are any number that can be defined as a fraction. Your number is the same as 3 and 1214122144/10000000000
no they are one and the same thing. A rational number is defined as any real number that can be expressed as a fraction p/q for two integers p, q.
There cannot be any rational"between" the same number.
1.4 is a rational number. It has a terminal decimal. It is the same as 14/10.
no. an integer is a whole, positive number, a rational number can be positive, negative, or a fraction
Rational; 37/10 is a ratio, and it is the same number as 3.7
A whole number k can be written in the form k/1 where k and 1 are both integers. It can, thus, be expressed in the form of a ratio and so is rational. Since it is rational it cannot be irrational. Simple!