What will come in place of the question mark (?) in the following series?
12, 13, 22, 47, 96, 177, ?
321, 240, ?, 105, 51, 6
4, 5, 11, 34, 137, ?
7 10 4 13 ? 16
...300, 150, 150, ?, 450, 1125
3, 8, 18, 33, 53, ?
13, 55, 111, 183, 273, ?
45, 58, 84, 123, ?, 240
62, 87, 137, ?, 312, 437
42, 48, 60, 84, 132, ?
