5. What is the missing number in the following series?

     13  7  18  10  5  ?  9  1  12  6


21. How would you write 944 in Roman numerals?


22. What four letter word can be placed in front of each of the following words to form new words?

     LINE
     PHONE
     WATERS


23. Each pair of numbers shares a relationship. Identify the relationship and find the missing number:

     2, 11     4, 67     5, 128     3, ?


24. If you have a two-in-five chance of winning something, what are your odds?


25. Complete the following analogy:

     B-sharp is to C as Bach is to ?


26. The series below, containing the numbers 1 through 10 can be completed by placing the missing numbers 2 and 3 at the end.
Which comes first, the 2 or the 3? Why?

     8  5  4  9  1  7  6  10  ?  ?


27. The meanings of the following five words can change with the addition of a certain common prefix. What is it?

     stance - station - title - tract - scribe


28. If one-half of 48 were 32, what would one-third of 18 be?


29. What are the chances of getting at least two heads when flipping a penny three times?


30. What is the least amount of digits that must be changed in the following addition problem to make the sum 173?

     68
     99
    +81