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

A. J

What number should replace the question mark in the series: 3, 8, 15, 24, ?, 60

B. 36

Identify the missing letter: x, u, r, o, ?

A. L

Complete the series: z, x, v, t, ?

A. R

Find the odd one out in the series: A, D, G, J, M, P, ?

B. R