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 9664 into separate digits: 9664 => 9 6 6 4 Step 2: Use the digits to create all unique Keys: 9 => 9 6 => 6 4 => 4 Step 3: Combine all unique Keys: 9 6 6 4 => 9 6 4
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