Which pair of words is different from the others?

C. STAR - SKY

In the series 2, 4, 8, 16, what is the next number?

C. 32

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

A. V

In the sequence 7, 14, 21, 28, 35, 42, how many times does the number 28 occur?

A. 1

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