Select the wrong term in the given alpha-numeric series.

Y17, A34, C51, F68, G85

Find the wrong number in the given series.
20, 40, 200, 400, 2000, 4000, 8000.

Find out the wrong number in a given series:
644, 328, 164, 84, 44, 24, 14...

A series is given with one term wrong. Select that wrong term from the given alternatives.
TS1, VO8, XK27, ZG64, BC125, EX216

A series is given with one term wrong. Select that wrong term from the given alternatives.
BFY253, GLU255, LRQ257, QXM259, VDI261, ZID265

Identify the term that does NOT belong to the following series.
H7 J14 L22 N28 P35 R42

One term in the following number series is incorrect. Find the incorrect term.
8, 4, 4, 6, 12, 24, 90