1. 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 Hint       2. From 1999 to 2000, the computer sales increased by 40% and the printer sales decreased by 40%. The ratio of printer sales to computer sales in 2000 was how many times the ratio of printer sales to computer sales in 1999?   7/3   3/5   1   3/7   5/3   Hint       3. 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?   PE/T   P/TE   TE/P   T/PE   TPE   Hint       4. A small square region inside a larger square is shaded. The diagonal of the larger square is three times the diagonal of the small square in length. What fraction of the area of the larger square is not shaded ?   1/9   1/3   2/3   8/9   cannot be determined   Hint       5. Which of the following is not equivalent to 4/5?   40%   0.8   80/100   400/500   40/50   Hint       6. 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       7. 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   cd/100   15cd/100   3cd/40   Hint