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 1398 into separate digits: 1398 => 1 3 9 8 Step 2: Use the digits to create all unique Keys: 1 => 1 3 => 3 9 => 9 8 => 8 Step 3: Combine all unique Keys: 1 3 9 8 => 1 3 9 8
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