Wednesday

April 16, 2014

April 16, 2014

Posted by **marco** on Tuesday, March 1, 2011 at 10:27am.

A VISA credit card has a first digit of 4 followed by 15 other digits. How many different VISA accounts does this allow?

I know the formulas but I am having a hard time determining which one to use. Help!!!

- Math -
**MathMate**, Tuesday, March 1, 2011 at 11:44amWe have a choice of 10 digits at each of the following digits, so the total number of choices is

10^(15).

In real life, the last digit (16th) is used for validation purposes, and is not a free choice. There number of "free" digits is therefore limited to 14. But that's not part of the math question.

- Math -
**marco**, Tuesday, March 1, 2011 at 12:20pmThank you!

**Related Questions**

Credit Cards - What are some credit card names? Such as Master Card and VISA. I ...

statistics - The First National Bank of Wilson has 680 checking account ...

business - Research the VISA website. After reviewing of all the documents you ...

Math 156 - I already did the first and third question I just need some one to ...

Marketing - 1. Recently American Express, Visa and MasterCard have been pushing...

Math - i am a four digit number. all of my digits are different. my first digit ...

Math (Reiny) - Regarding my question below, when the question talks about digits...

math - A chartered bank is raising the interest rate on its Visa credit card ...

Geometry - Luis has a simple calculator that has buttons for the digits 0 ...

Geometry - Luis has a simple calculator that has buttons for the digits 0 ...