One, and e.
The answer depends on who they are that possess rational numbers.
As much as, in these days of uncertainty, anything can be anything. As long as the constraints of a rational number are kept to, a rational number will always remain a rational number.
Yes.
Yes, but only if the rational number is 0.
200.
The square root of 61.93 is irrational. Since rational numbers are infinitely dense there cannot be a closest rational.
It is rational.
No, it is irrational. Furthermore, it is transcendental.
One, and e.
2.756 is a rational number. A rational number is any number that can be expressed as an integer, fraction or mixed number, or decimal. Irrational numbers cannot be expressed as simple fractions and do not have repeating decimals such as π (pi), e, and the square root of 2.
The answer depends on who they are that possess rational numbers.
First - 50 is a rational number, not an irrational number since it can be represented as a ratio of integers, i.e. 50/1 With that said: the two integers closest to it are 49 and 51
No, the result is always an irrational number. In more advanced math it is possible to add an infinite amount of rational numbers by way of Taylor Series and get an irrational number. This is how numbers like "Pi" and "e" are derived.
e^pi ~ 23.14069.............., not rational
It is a rational number. It can be written as a fraction.
It can be a real number which is not a rational number. That is, an irrational number such as sqrt(2), or cuberoot(5), or pi, or e, or phi. Or it can be a number that is not even a real number, such as a complex number or a quaternion.