pinagtea|Easy Ciphers Tools:

pinagtea|Easy Ciphers Tools: : Baguio An icon used to represent a menu that can be toggled by interacting with this icon. Since you can repeat the digits the NUMBER of 4 digit combinations is relatively easy to calculate. Suppose that you are going to write one of these 4 digit combinations. You have 10 choices for the first digit. . Finally you have 10 choices for the fourth digit and thus there are 10x10x10x10 = 10 000 possible 4 digit combinations from 0-9.