1. The arithmetic mean (average) of 3, 5, 7 and y is 100. What is the value of y?   85   95   105   115   385   Hint Hint       2. In the figure, each of the four white "petals" is formed by the intersection of two semicircles. Each of the four semicircles is drawn with its center at the midpoint of each side of the square. If the length of the side of the square is 2, what is the total area of the shaded region excluding the petals?   4 − π   1 − π/4   8 − 2π   16 − 4π   32 − 8π   Hint       3. A quiz consists of true and false questions. The ratio of the number of true questions to the number of false questions is 4:3. About what percent of the questions are false?   43%   57%   67%   83%   86%   Hint       4. A toy factory manufactures d dolls every hour. Each doll costs c cents. How many dollars will the factory spend in costs for manufacturing dolls in 7 hours and 30 minutes?   cd/750   7cd/100   3cd/40   cd/100   15cd/100   Hint       5. An total of $45,000 in prize money is to be divided unequally among the top three contestants. What is the value of the largest prize?   $9,000   0,000   2,000   5,000   $27,000   Hint       6. Which of the following is not equivalent to 4/5?   400/500   0.8   80/100   40%   40/50   Hint       7. An office requires P sheets of paper each month for each employee. If there are E employees in the office, for how many months willT sheets of paper last?   T/PE   P/TE   PE/T   TPE   TE/P   Hint