Which one set of letters when sequentially placed at the gaps in the given letter series shall complete It?
_c_bd_ cbcda_a_db_a

Identify the number that does not belong to the following series.
2, 9, 28, 64, 126, 217, 344, 513

A series is given, with one number missing. Choose the correct alternative from the given ones that will complete the series.
M5D, O7G, Q10J, ?, U19P

Direction: In the following question, select the missing number from the given series.
7, 10, 14, 19, 25, ?

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

5 , 10 , 17 , ? , 37 , 50 

Identify the number that does NOT belong to the following series.

14, 21, 63, 378, 3402

Select the term that will come next in the following series.
OBE, PDH, QFK, RHN, ?

Select the number that can replace the question mark (?) in the following series.
423, 407, 439, 391, 455, ?