matematicasOnline version series by Acela Love 1 1, 3, 7, 15, 31, ? a 63 b 64 c 46 d 16 2 3, 7, 6, 10, 9, 13, ? a 6 b 8 c 12 d 11 3 22, 20, 23, ?, 24, 22, 25 a 21 b 25 c 22 d 20 4 2, 4, 5, 10, 11, 22, ? a 26 b 20 c 44 d 23 5 2, 10, 3, 9, 4, 8, ? a 7 b 5 c 6 d 10 6 1, 1, 2, 3, 5, 8, ? a 18 b 13 c 20 d 12