What letter comes next in the series: A, E, I, M, ?

A. O

Find the missing letters in the series: b, d, f, h, ?

A. J

Identify the missing letter in the series: m, n, o, p, ?

A. Q

Identify the missing letter in the series: m, n, p, q, ?

A. R

What is the missing term in the series: 12, 24, 48, ?, 192

A. 96