Their denominators have prime factors of 2 or 5.
There is nothing that you can conclude.They could be recurring decimals or terminating decimals [as rational numbers, there is no other form].They may or may not be in their simplified or reduced form: for example 14/7 is a rational number with a prime denominator but it can be simplified.
All prime numbers are rational.
All prime numbers are integers. All integers are rational.
rational and prime numbers
29 is rational. Rational numbers are numbers that can be written as a fraction. Irrational numbers cannot be expressed as a fraction.
Yes, they're integers.
All prime numbers are rational number because they can be expressed as 'top heavy' fractions as for example the prime number 3 as a fraction is 3/1
There is no special hypothesis that you can come up with. You could, of course, hypothesize that they are special numbers. It is a hypothesis even if a rubbish one.
Yes. Rational numbers are numbers that can be written as a fraction. Irrational numbers cannot be expressed as a fraction.