1. based only in clues a and b: the possible numbers are any number between 69 and 82.
2. When you use clue C, you’re down to only odd numbers: 71, 73, 75, 79 and 81. Then with club D you only have one number left out of those that when added the digits together it equals 12: 75.
3. Therefore G is 75
4. All for clues were important to figure out what number was G