To show you how to calculate the Distances filter for a Pick 3 number here a step by step example.
Step 1: Divide the number into separate digits: 310 => 3 1 0 Step 2: Calculate the distance between each digit and the next (the last digit with the first): 3 to 1 = 2 1 to 0 = 1 0 to 3 = 3 Step 3: Combine the filters to a string: 2 1 3 = 213