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 639 into separate digits: 639 => 6 3 9 Step 2: Add up the digits: 6 + 3 + 9 = 18
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