If the top row of Pascal's Triangle is row 0, then what is the sum of the numbers in the ninth row?

510

512

256

511

Given the following sets A = {1, 2, 3} and B = {a, b}, which of the following are functions given the Cartesian product A x B?

a { (1, a), (2, b), (3,b) } b { (1, a), (2, a), (3, a) } c { (1, a), (2, a), (1, b), (3, a) } d { (1, a) }

a b c d

a b

a b c

a b d

For the Pascal triangle with row sum = 128, how many relations are possible with 3 tuples

(see the document Relationand PascalTriangleExamples.doc page 11 )

7

21

35

none of the above

A special type of password consists of four different letters of the alphabet, where each letter is used only once. How many different possible passwords are there?

		264
		26P4
		426
		26C4