Passage: In mathematics, the natural numbers are those used for counting (as in "there are six coins on the table") and ordering (as in "this is the third largest city in the country"). In common mathematical terminology, words colloquially used for counting are "cardinal numbers" and words connected to ordering represent "ordinal numbers". The natural numbers can, at times, appear as a convenient set of codes (labels or "names"); that is, as what linguists call nominal numbers, foregoing many or all of the properties of being a number in a mathematical sense.

Question: What are natural numbers?
those used for counting (as in "there are six coins on the table") and ordering (as in "this is the third largest city in the country