Here's a great article that explains what all the numbers on a credit card mean
http://techniglee.com/2011/01/credit-card-numbers-explained/
they mean that they are numbers of or to pertaining to the numbers on the product. Identifiers.
what does it mean
Negative numbers means
Prime numbers are numbers with only two factors. Composite numbers are numbers with more than two factors.
If you mean larger by "the set of whole numbers strictly contains the set of natural numbers", then yes, but if you mean "the set of whole numbers has a larger cardinality (size) than the set of natural numbers", then no, they have the same size.
Here's a great article that explains what all the numbers on a credit card mean http://techniglee.com/2011/01/credit-card-numbers-explained/
The first digit of a credit card indicates the type of credit card you are holding. Three is American Express, 4 is a Visa card, 5 is MasterCard, and 6 is Discover. The numbers that follow identify the issuing institution; indicate the type of card, whether debit or credit; and are numbers assigned to you by the issuing institution.
The red numbers on the back of a social security card are control numbers that verify the authenticity of the card. They serve no other purpose.
It is the long set of big numbers running across the middle of the face of the card (usually divided into 4 blocks of 4 numbers).
A notation used to express the members of a set of numbers.
A birthday card allows you to express yourself when you find it hard to say the words you mean. Also a birthday card can be a good way to surprise someone either with money or gift cards.
The red numbers on the back of a social security card are control numbers that verify the authenticity of the card. They serve no other purpose.
do u mean zwinky?
its the last three numbers on the back of the card
If you are talking about the numbers on the bottom-left corner of a card, then no, the ID number on a card simply means its card number. Every kind of one card have the same ID number. These ID numbers merely tell what card it is.
The four "x"s at the end of the credit card receipt indicate the last four numbers of the credit card. They are there to prevent identity theft and fraud. However, usually the last four numbers are visible and the previous twelve numbers are 'x'd out.
From my experience (being a cashier), you only see "unathorized card" if you try to run a credit only card (such as American Express) as a debit. I've seen a few unemployment cards display an "unathorized card" message whenever someone tried to run it as a "credit" instead of "debit". It could mean something else entirely, however, as MOST unemployment cards will run as credit, even though the rules say you MUST run it as debit.