Math Filters Sums Pick 3 The Sums filter is a so called "math filter". Math filters are created through calculations. You get the sum of a number by adding up the digits within that number. To show you how to calculate the Sums filter for a Pick 3 number here a step by step example.
Step 1: Divide the 221 into separate digits: 221 => 2 2 1 Step 2: Add up the digits: 2 + 2 + 1 = 5
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