12,17,19,20,24,25,28,29,32,34,35,40,43,45,46,49,53,54,57,62,65,67,68,70,71,74,76,78,79,80,81,82,84,85,87,89,92,93,94,95,96,97,98 are still open, and one of them is the correct answer!