1.	What is the least common multiple of 4, 5, and 16?
		A.	80	B.	160
		C.	64	D.	16
		Hint
	2.	Find the sum (-4) + 6.
		A.	-10	B.	10
		C.	2	D.	-2
		Hint
	3.	Find the difference of (-2) and 5.
		A.	-7	B.	3
		C.	-3	D.	7
		Hint
	4.	Find the solution for 12r = -132.
		A.	-144	B.	-11
		C.	-120	D.	-12
		Hint
	5.	Find the least common multiple of 15 and 6.
		A.	30	B.	15
		C.	45	D.	60
		Hint
	6.	Find 6 + (–10).
		A.	–16	B.	16
		C.	4	D.	–4
		Hint
	7.	Subtract 6 – 12.
		A.	6	B.	18
		C.	-6	D.	-18
		Hint
	8.	Find the difference –5 – (-11).
		A.	-6	B.	6
		C.	16	D.	-16
		Hint
	9.	Find the product 3(-12).
		A.	-9	B.	-36
		C.	9	D.	36
		Hint
	10.	Find the LCM of 25 and 30.
		A.	150	B.	750
		C.	275	D.	120
		Hint