If A is to B as C is to D, and A is the first letter of the alphabet while D is the fourth letter, what is the relationship between B and C?

A. B IS THE SECOND LETTER OF THE ALPHABET

What letter comes before 'M' if we follow the pattern of moving two letters back in the alphabet?

B. L

Identify the pattern: 3, 6, 11, 18, ?

A. 27

What comes next in the series: Z, Y, X, W, ?

A. V

Find the missing number in the series: 5, 10, 20, ?, 80

B. 40