List of possibilities after Clue #1:

{ 2, 3, 4, 6, 8, 9, 12, 14, 16, 18,

21, 24, 26, 27, 28, 32, 34, 36, 39, 42,

46, 48, 51, 52, 54, 56, 63, 64, 68, 69,

72, 74, 78, 81, 84, 86, 92, 94, 96, 98 }