Combined Filters VZero Alt Sums The VZero Alt Sums (VTZ-AS) is a so called "combined filter", a combination of two filters:
VZero (VTZ) is a different representation of the VTracs (VTX) concept with the difference that the digits start with 0 rather than 1. That simplifies the conversion drastically as the first five digits (0, 1, 2, 3 and 4) are the same in both number and VZero conversion. The Alt Sums filter is a so called "math filter". Math filters are created through calculations. In this case starting with the highest digit of the number the digits are alternately subtracted and added to create the Alt Sums between 0 and 9. To show you how to calculate the VZero Alt Sums filter select one of the links below for a step by step example.
VZero Alt Sums
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