The Divide into 5 portions of sum of the 1st and 2nd digits

The sum of the 1st digit and the 2nd digit of the lucky draw number is divided into 5 divisions

Part 1: 1 - 15

Part 2: 16 - 30

Part 3: 31 - 45

Part 4: 46 - 60

Part 5: 61 - 75