The difference between the 1st and 2nd digits is divided into 7 portions

The difference between the 1st and 2nd digit of the lottery numbers is divided into 7 parts.

Part 1: 1 - 4

Part 2: 5 - 8

Part 3: 9 - 12

Part 4: 13 - 16

Part 5: 17 - 20

Part 6: 21 - 24

Part 7: 25 - 28