#### The **Luhn algorithm** or **Luhn formula**, also known as the modulus 10″ or “mod 10” algorithm, was developed in the 1960s as a method of validating identification numbers. Number communication accuracy can be using this formula

#### Take time to explore:

#### Read this article about the formula and how it is used in real life to catch errors when shopping online. Research the creator Peter Luhn and make a timeline about his life.

#### In this video you will learn how to use the Luhn Algorithm. Make the table on paper as you watch.

#### Math challenge presented by CEMC math POTWC-20-NN-PA-21-P . Print it out, read the page and look at the different strategy that they present to you. Try to figure out the last challenge. Answer key for challenge. You can use this to check you work.