span
The maximum size minus the minimum number in the current lottery number is the span, also called head-to-tail difference (for group selection numbers). The maximum margin is 9 and the minimum margin is 0. If the lottery number is 237 and 7-2=5, then the span value is 5.
Span is a very important parameter index in digital lottery. If the span can be determined, at least one or several double code combinations can be determined, for example:
Span 9: 09 Combination of combinations;
Combination of span 8: combination of 08 and 19;
Combination of span 7: combination of 07, 18 and 29;
Combination of span 6: combination of 06, 17, 28 and 39;
Combination of span 5: combination of 05, 16, 27, 38 and 49;
Combination of span 4: combination of 04, 15, 26, 37, 48 and 59;
Combination of span 3: combination of 03, 14, 25, 36, 47, 58 and 69;
Combination of span 2: combination of 02, 13, 24, 35, 46, 57, 68 and 79; The number of spans 2 must be straight or group 3.
Combination of span 1: combination of 0 1, 12, 23, 34, 45, 56, 67, 78, 89; Numbers with a span of 1 must be group 3.
Combination of span 0: 00, 1 1, 22, 33, 44, 55, 66, 77, 88, 99; Numbers with a span of 0 must be leopards.