Let A = {1, 2} and B = {3, 4}. Write A X B.  How many subsets will A x B have ?

5

If A = {-1,1}, Find A A A.

6

If A B = {(a,x),(a,y),(b,x),(b,y)}, Find A and B.

8

Let A and B be two sets such that n(A) = 3 and n(B) = 2. If (x,1)(y,2), (z,1) are in A B, find A and B, where x,y and z are distinct elements.

9

The Cartesian product A x A has 9 elements among which are found (-1,0) and (0, 1). Find the set A and the remaining elements of A x A.