Answer:
12 is a rational number because it can be expressed as the quotient of two integers: 12 ÷ 1.
12 belongs to the sets of natural numbers, integer numbers, rational numbers, and real numbers.
First, we can see that it is a whole number, so it is an integer number.
Also, all positive integers are natural numbers, so 12 is also a whole number.
Now, we also can rewrite 12 as:
12 = 12/1
So it is a quotient between two integer numbers, thus, 12 is also a rational number.
Finally, the trivial answer, 12 belongs to the set of the real numbers (the set that contains all the numbers).
Concluding:
12 belongs to the sets of whole numbers, integer numbers, rational numbers, and real numbers.
If you want to learn more about sets of numbers:
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