what is master card number look like?

Answer 1

There are 16 numbers on the front of the card.
It always start with the number 5! The first digit is the system number and that is 5 for master card.
System number, follow by bank number then to account number, and finally
Digit 16 is the check number.

The last 3-digits on the back of the card are the security number, which will be changed when the card expired.

Answer 2

If you have to ask, you apparently don't have your own. In that case, why do you need to know?

Answer 3

5_ _ _ _ _ _ _ _ _ _ _ _ _ _ _