1. Dwayne has 10 blue shirts and 12 red shirts. What's the ratio of blue shirts to red shirts that Dwayne has? 2. An old computer does a calculation in .5 seconds. A newer model does the same calculation in .2 seconds. What's the ratio of the time it takes the old computer to do the problem to the time it takes the new computer to do the problem?

3. A candy store stocks 12 types of chocolate bars, of which it has 24 each. The store also stocks 8 brands of hard candy, of which it has 32 each. What's the ratio of chocolate bars to the number of hard candies?

A cake recipe calls for 1/2 teaspoon of salt, 11/2 teaspoons of baking soda, and 1 teaspoon of vanilla. What's the ratio of salt to baking soda to vanilla in the recipe?

4. A company expands and hires some new employees. If the ratio of new employees to old employees in the company is 1 : 3, and there are now 1,200 people working for the company, how many new employees did the company hire?

5. The ratio of the length of a rectangle to its width is 7 : 2. If the perimeter of the rectangle is 108 centimeters, what are the dimensions of the rectangle?

6. A cash machine only gives out $5 bills and $20 bills. Suppose you take out $210, and the ratio of $5 bills to $20 bills you get is 2 : 1. How many bills of each denomination do you receive?

7. At a town meeting, the ratio of dark-haired people to blond-haired people to red-haired people is 42 : 37 : 3. If there are 1,312 people at the meeting, how many have each color hair?

8. In a certain apartment complex, all 120 residents own cars. If there are only four colors of cars, and the ratio of red to blue to green to yellow cars is 5 : 6 : 3 : 1, how many cars of each color are there?