What will come in place of question mark (?) in the following number series?
4, 3, 9, 34, 96, 219, 435
[IBPS CWE (PO/MT), 2012]
157.5, 45, 15, 6, 3, 2, 1
[IBPS CWE (PO/MT), 2012]
850, 843, 829, 808, 788, 745, 703
[IBPS CWE (PO/MT), 2012]
33, 321, 465, 537, 573, 590, 600
[IBPS CWE (PO/MT), 2012]
37, 47, 52, 67, 87, 112, 142
[IBPS CWE (PO/MT), 2012]
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