Question

To create an entry code you must first choose 2 letters and then 4 single digit numbers how many different entry codes can you create?

Answer 1

you must first choose 2 letters and then, 4 single-digit numbers. How many different entry codes can you create?

List total combinations using the product of all possibilities:
26 letters * 26 letters * 10 digits (0-9) * 10 digits (0-9) * 10 digits (0-9) * 10 digits (0-9)
6,760,000