The filter accepts tickets that have the sum of their first and/or last digits in the selected range. Each pool number breaks down into two digits. The first digit is the leading digit of the number, the last digit is the second digit of the number. For example the first digit of number 23 is 2, the last digit of that number is 3. The first digit of number 9 is 0, the last digit of that number is 9.
When filter settings are Sum of first and last digits is min: 25 max: 25 then
When filter settings are Sum of first digits is min: 0 max: 0 then
See also First/Last Digits Sum statistics.