A key code must contain 6 numerals. There are 10 numerals available. Using these numerals, how many different key codes may be created?

To solve, you will raise the number of numerals available (10) to the number of numerals required for each key code (6) : 10 ^ 6. This will give you the total number of possible combinations. When raising 10 to a number, you simply put as many zeros as the number of the exponent: 1,000,000