There are infinitely many of them.
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Infinitely many. Between any two different real numbers (not necessarily rational) there are infinitely many rational numbers, and infinitely many irrational numbers.
5 is rational. Rational numbers are numbers that can be written as a fraction. Irrational numbers cannot be expressed as a fraction.
Every rational number does.
Whole numbers are the counting numbers: 1, 2, 3, 4, 5, 6, etc. 0 and the negative numbers -1, -2, -3, -4, etc. are also sometimes considered whole numbers. Rational numbers are numbers which can be expressed by a/b, where a and b are both integer (whole) numbers. In other words, rational numbers are numbers which can be written as fractions of whole numbers. All whole numbers are rational numbers because they can be expressed as a fraction where the numerator is the original number and the denominator is 1 (e.g., 5 = 5/1). Not all rational numbers are whole numbers, however. For instance, 3/7 is a rational number because it is a fraction of integers, but 3/7 is not a whole number.
A rational number is any number which can be written as a quotient of 2 integers i.e can be expressed as a/b. So six rational numbers between 3 and 4 would be 10/3, 17/5, 19/6, 11/3, 13/4, 22/7 Though there are many more than that.