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Is the number "3" real?

There are three cars in my driveway right now. I can see and touch the cars, but I can't see or touch the number "3". Are numbers inherent to reality, or merely mental constructs?

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    Sep 22 2013: Do you define "real" as something you can touch?
    • Sep 23 2013: Hi, Fritzie. Your question illuminates a flaw in my example. No, I don't define "real" as something I can touch. I'm not even sure I can come up with a good definition of "real." My common sense notion of the cars, though, is that they exist whether or not my mental construct of them exists or not. Of course, the notion of "car" is a mental construct, as is any other verbalization I might give. Still, there seems to be some independent physical existence to which I am attaching the word "car."

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