Question 1122839
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There are several subsets of the set of all real numbers, to that the number 2/3 belongs.


They are:


<pre>
    - Subset of all rational numbers;             (*)

    - Subset of all positive numbers;

    - Subset of all rational positive numbers.


      . . . Other examples are possible . . . 
</pre>

But the most expected response is, probably, (*).