Latest IBM Aptitude Question SOLUTION: What is the next number of the following sequences 1) 1, 3, 3, 2, 8, 10, 3, 4, 12, 4, 8, ? (Is it 21?) 2) 9, 12, 4, 8, 12, 15, 5, 9, 3, 6, 2, 6, 6, 9, ? (Is it 3?) 3) 15 3/4, 1