Find the odd one out in the series: A, C, E, G, H, I, K

B. H

Complete the series: a, e, i, o, ?

A. U

Find the missing letter in the series: z, x, v, t, ?

C. Q

Identify the missing number in the series: 12, 24, 48, ?, 192.

B. 96

What is the next number in the series: 3, 6, 11, 18, ?

B. 25