What is the L.C.M. of the polynomials x^2 - 1 and x^2 - 4?

A. (X - 1)(X + 1)(X - 2)(X + 2)

In a circular seating arrangement, A is sitting to the immediate right of B. C is sitting opposite to A. D is sitting to the immediate left of B. Who is sitting to the immediate right of C?

C. D

If the code for 'CAT' is 12, 15, 18 and the code for 'DOG' is 14, 16, 20, what is the code for 'BIRD'?

B. 8, 10, 12, 14

In a circular arrangement, X is sitting between Y and Z. W is sitting to the immediate left of X. Who is sitting to the immediate right of Y?

C. Z

In a certain code, 'DOG' is coded as '415'. How is 'CAT' coded in the same language?

A. 312