Which number among the following does not belong to the series 8, 27, 50, 125, 343?

Direction : What should come in place of the question (?) in the following question.

15  34    20   ?   25    43  30

Direction (66-70): What should come in place of the question mark(?) in the following number series?

4    6    14    44  ?   892

Direction : What should come in place of the question (?) in the following question.

16  8    12   30  ?    472.5

What will come in place of question mark ( ? ) in the following series?
13, 25, 61, 121, 205, ? 

Direction (66-70): What should come in place of the question mark(?) in the following number series?

12664   34    20  14 ?

If a , b , c are in AP and x , y and z are in GP , then $${x^{b-c}.{y^{c-a}.z^{a-b}=?}}$$

What will come in place of the question mark (?) in each of the following series?

15     ?    24    33     97    122