Math Set 1

Ratios

1. The ratio of boys to girls in a class is 3:5. If there are 40 students in total, how many boys are in the class? (12 | 15 | 24 | 25)
2. A recipe calls for flour and sugar in the ratio 4:3. If you use 12 cups of flour, how many cups of sugar do you need? (8 cups | 9 cups | 10 cups | 16 cups)
3. Which ratio is equivalent to 15:25? (2:5 | 3:5 | 5:3 | 3:4)
4. A map has a scale of 1:50,000. If two cities are 4 cm apart on the map, what is the actual distance in kilometers? (2 km | 20 km | 200 km | 0.2 km)
5. The ratio of cats to dogs at an animal shelter is 7:4. If there are 28 cats, how many dogs are there? (12 | 16 | 14 | 49)
6. A classroom has red, blue, and green markers in the ratio 2:3:5. If there are 50 markers in total, how many blue markers are there? (10 | 15 | 25 | 20)
7. Express the ratio 45 minutes to 2 hours in simplest form. (45:2 | 3:8 | 45:120 | 9:24)
8. If 3 pencils cost $1.50, how much would 7 pencils cost? ($3.00 | $3.50 | $4.00 | $5.25)

Proportions

1. Solve for x: 4/6 = x/15 (x = 8 | x = 10 | x = 12 | x = 9)
2. If 5 workers can complete a job in 12 days, how many days would it take 10 workers? (24 days | 6 days | 8 days | 4 days)
3. A car travels 180 miles in 3 hours. At this rate, how far will it travel in 5 hours? (250 miles | 300 miles | 360 miles | 270 miles)
4. Solve for x: 8/12 = 14/x (x = 18 | x = 21 | x = 24 | x = 16)
5. A tree casts a shadow 15 feet long. At the same time, a 6-foot person casts a shadow 4 feet long. How tall is the tree? (20 feet | 22.5 feet | 25 feet | 18 feet)
6. If 8 oranges cost $4.00, how many oranges can you buy for $6.00? (10 | 12 | 14 | 16)
7. On a scale drawing, 1 inch represents 8 feet. If a room is 20 feet long, how many inches long is the room on the drawing? (2 inches | 2.5 inches | 3 inches | 4 inches)
8. Solve for x: 9/x = 27/12 (x = 4 | x = 6 | x = 3 | x = 8)
9. A machine produces 240 parts in 4 hours. How many parts will it produce in 7 hours? (360 parts | 420 parts | 480 parts | 560 parts)

Percent

1. What is 35% of 240? (72 | 84 | 96 | 68)
2. A shirt originally costs $45. If it ($13.50 | $31.50 | $15.00 | $30.00)
3. If 18 is 25% of a number, what is that number? (54 | 72 | 45 | 90)
4. A population increases from 800 to 920. What is the percent increase? (12% | 15% | 18% | 20%)
5. Convert 5/8 to a percent. (58% | 62.5% | 65% | 58.5%)
6. A test has 80 questions. If you answer 68 correctly, what percent did you get correct? (80% | 85% | 90% | 75%)
7. The price of a car decreased from $25,000 to $20,000. What is the percent decrease? (15% | 20% | 25% | 10%)
8. A store marks up items by 40%. If an item costs the store $50, what is the selling price? ($60 | $70 | $90 | $65)