Series Completion · Logical Reasoning · BITSAT

Selecty the letter-cluster that can replace the question mark (?) in the following series. TULG, WRPC, ZOTY, CLXU, ?

Select the letter-cluster that can replace the question mark (?) in the following series. TXB, QWE, NVH, KUK, ?

Complete the series by replacing '?' mark. G4T, J9R, M20P, P43N, S90L, ?

Find out the wrong number. 2, 6, 12, 72, 865, 62208