Subset Filters Keys Pick 4 The Keys filter is a subset filter. The term key refers to any unique digit as part of a number. To show you how to create the Keys filter for a Pick 4 number here a step by step example.
Step 1: Divide the 5575 into separate digits: 5575 => 5 5 7 5 Step 2: Use the digits to create all unique Keys: 5 => 5 7 => 7 Step 3: Combine all unique Keys: 5 5 7 5 => 5 7
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