The difference between the 1st and 2nd digits is divided into 5 portions

The difference between the 1st and 2nd digit of the lottery numbers is divided into 5 parts.

Part 1: 1 - 15

Part 2: 16 - 30

Part 3: 31 - 45

Part 4: 46 - 60

Part 5: 61 - 75