Which letter-cluster will replace the question mark (?) to complete the given series?

AVTE CTRG ERPI GPNK   ?

Which letter-cluster will replace the question mark (?) to complete the given series?

HFK, KHM, ?, QLQ, TNS

Which of the following numbers will replace the question mark (?) in the given series?

97, 131, 165, 199, 233, ?

Which letter-cluster will replace the question mark (?) to complete the given series?

QML, PRC, OWT, NBK, ?

Which of the following numbers will replace the question mark (?) in the given series?

1, 3, 6, 18, 36, 108,?

Which letter-cluster will replace the question mark (?) to complete the given series?

CABQ, CEJC, CIRO, CMZA, ?

Which of the following numbers will replace the question mark (?) in the given series?

BLJS, FOLT, ?, NUPV, RXRW

Select the option that represents the letters that, when placed from left to right in the following blanks, will complete the letter series.
_ V J R W B _ _ R W B V L _ _ B V _ _ W