What is the missing number in the series: 2, 6, 12, 20, ?, 42

B. 32

Identify the missing letter in the series: Z, X, V, T, ?

D. U

Complete the series: 7, 14, 28, 56, ?, 224

A. 112

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

D. H

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

A. 32