96...1 + 4 = 52 + 5 = 12 (12-5 = 7)3 + 6 = 21 (21-12 = 9)4 + 7 = 21 + 11 = 325 + 8 = 32 + 13 = 456 + 9 = 45 + 15 = 607 + 10 = 60 + 17 = 778 + 11 = 77 + 19 = 96