What is the next letter in the series: M, O, Q, S, ?

B. T

What is the missing number in the series: 2, 4, 8, 16, ?, 64?

A. 32

Identify the missing number in the series: 5, 10, 20, 40, ?, 160.

A. 80

Find the odd one out in the series: A, C, E, G, I, K, M, O, Q, R

D. R

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

A. H