Maths practice for 12-year-olds - page 289 of 306
Examples and word math problems for 7th grade.Number of problems found: 6111
- Alcohol 2
Two types of alcohol, one 46% and second 64%, give 16 liters of 54% alcohol. How many liters of each type are in the mixture? - Knight
Knight passed 36 km long track in 144 minutes. What was his average speed? - Price reduction
The price of the camera is 654 USD on sale. They reduced its price to 411 USD. Calculate the percentage reduction in the price of the camera. - New refrigerator
The new refrigerator sells for 1024 USD. Monday will be 25% discount. How much will USD save, and what will be the price?
- MPG
$m miles a week fills up twice a week. Each fill is $g gallons. What is the gas mileage of the car? - Double percent
What is 40% of 80% of 11800? - Complementary angles
Two angles are complementary. If one angle measures 10°, what is the measure of the second angle? - Slope
Calculate the slope of a line that intersects points (-6,-25) and (79,23). - CD disc
A compact disc has a diameter of 11.8 cm. What is its surface area in square centimeters?
- Sales off
What was its original price if a sweater sells for $ 19 after a 5% markdown? - Diameter
If the endpoints of the diameter of a circle are A(-9, 10) and B (-5, -4), what is the circle's radius? - Division
Three siblings, Helena, Oliver, and George, split the bag with candies on merit in the ratio 6:1:4. How many candies should each get if in the bag were 88? - Flowerbed 2
Around the square flower bed in a park is a sidewalk about 2 m wide. The area of this sidewalk is 243 m². What is the area of the flowerbed? - Trapezoid ABCD v2
Trapezoid ABCD has a length of bases in ratio 3:10. The area of triangle ACD is 825 dm². What is the area of trapezoid ABCD?
- The professor's birthday
Professor of mathematics had 44 birthdays. The director congratulated him. The professor asked the director: "And how old are you?" The director replied: "I'm exactly twice as many years as you were when I was old as to you today." How old is the director - Bases
The length of the bases trapezium is in ratio 4:5. The length of the midline is 15. How long are the bases of a trapezoid? - Divers
20-member group of divers carries the air for 15 hours of diving. 4 members of the expedition were sick or weren't coming. How many hours is sufficient air to other divers? - Racer
The first racer runs at a speed 20 m/s and is 750 meters before the finish and ahead 79 meters before the second competitor. At what speed must run the second racer catch the first racer at the finish line? - Tram
In the three-part tram went 206 passengers in front of others, 226 after others and in the middle half. How many passengers went in the tram total?
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