Subset Filters Keys Pick 3 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 3 number here a step by step example.
Step 1: Divide the 703 into separate digits: 703 => 7 0 3 Step 2: Use the digits to create all unique Keys: 7 => 7 0 => 0 3 => 3 Step 3: Combine all unique Keys: 7 0 3 => 7 0 3
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