2. What is the additive inverse of -23?
A. 23
B. -23
C. 0
D. 1

7. What is the least common denominator of 2/3 and 3/8?
A. 8
B. 24
C. 12
D. 16

8. What is the union of the set of rational numbers and the set of irrational numbers?
A. Real numbers
B. Integers
C. Complex numbers
D. Natural numbers

10. What is the product of the first 4 even numbers?
A. 324
B. 364
C. 374
D. 384

13. What is n(A) if A= {x/x is a letter of the English alphabet}.
A. 24
B. 25
C. 26
D. 28

14. Which of the following sets of integers is arranged in descending order?
A.{-10,-12,-14,16,-18}
B.{-1,0,-2,3,5}
C.{-20,-16,-14,-12,-10}
D.{5,3,0,-2,-1}