12, 18, 30, 54, ?, 198
4, 7, 12, 21, 36, ?
53 × 38 + 32 × ∛54872 = ?
?, 32, 75, 144, 245, 384
16, 24, 36, ?, 81, 121.5
4 9 28 99 ? 2105 12660
...41, 82, ?, 984, 4920, 29520
Complete the series choosing the missing number.
110, 99, 86, ___, 54, 35.
2 3 5 9 ? 33
...92, 88, 79, ?, 38, 2
