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. What is 2% of 7%?   0.014%   0.09%   0.14%   1.4%   14%   Hint       3. What is z if 2.5% of z equals 75% of 50?   10   25   50   75   1500   Hint       4. 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       5. A car's price decreased by 20% from 1998 to 2000. If the price of the car was P dollars in 2000, what was it in 1998?   0.75P   0.8P   1.2P   1.4P   1.25P   Hint       6. If x + y − z = 5 and x − y + z = 10, which of the following statements MUST be true? I. y > z II. x > 5 III. y > 5   I only   II only   III only   I and II only   II and III only   Hint       7. 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?   1 − π/4   32 − 8π   16 − 4π   8 − 2π   4 − π   Hint