Which of the following is a factor of the polynomial x^2 - 5x + 6?

A. X - 2

Five people: X, Y, Z, W, and V, are sitting in a row. X is to the left of Y but not next to W. Z is sitting next to V. Who is sitting in the middle?

C. Z

Identify the incorrect letter in the series: A, B, D, E, G, H, J

B. D

If the word 'CAT' is coded as 3120, what is the code for the word 'DOG'?

A. 4157

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

A. J