5. A person paid a total of $600 for shirts priced at $6 and $24 each. If the person purchased six $6 shirts for every $24 shirt, what was the total number of shirts purchased ?

   (A)    40
   (B)    100
   (C)    25
   (D)    28
   (E)    70

Questions 6 - 8 refer to the following definition.

Let f be defined by the equation:
x f y = x + y - xy

6. If 12 f s = 78, then s = ?
   (A)    6
   (B)    66/13
   (C)    - 6
   (D)    90/13
   (E)    6.5

7. 6 f 8 = ?

   (A)    14
   (B)    34
   (C)    48
   (D)    -34
   (E)    62

8. For what value of ’a’ is the statement a f b = a always true ?

   (A)    1
   (B)    0
   (C)    -1
   (D)    2
   (E)    -2

9. If (64)^m = 2^{m+ 4}, what is the value of m?

10. 
    

     

    Quadrilateral KLMO is a rectangle and XYZW is a square. If the perimeter of rectangle KLMO is equal to that of the square XYZW, what is the length of side XW ?

    (A)    12
    (B)    5
    (C)    8
    (D)    24
    (E)    10

11.     .

In the figures above, if the area of the equilateral triangle is equal to area of the square then K = ?

(A)    6
(B)    3
(C)    11.25
(D)    5⁵/8
(E)    11

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