1.	How many blocks are used in Stages 1–3?
		A.	9, 15, 21	B.	4, 7, 10
		C.	3, 6, 10	D.	3, 7, 10
		Hint
	2.	Find an expression for the number of blocks in Stage s.
		A.	s + 3	B.	3s
		C.	3s + 1	D.	2s – 1
		Hint
	3.	Draw a top-count view of this block
		A.		B.
		C.		D.
		Hint
	4.	Find the top-count view of Stages 3 and 4 for the block pattern below.
		A.
		B.
		C.
		D.
		Hint
	5.	Find an expression for the number of blocks in Stage s.
		A.	2s + 1	B.	2s2
		C.	s2	D.	s + 1
		Hint