Maths practice for 12-year-olds - page 147 of 351
Number of problems found: 7015
- Reinforcement 42491
The concrete ring (used for reinforcement in wells) has an inner diameter of 800 mm and an outer diameter of 900 mm. It is made of concrete with a density of 2,500 kg/m³. Its height is 1 m. Calculate its mass. - Michael 42461
Michael will read the book in 8 days if she reads 15 pages daily. How many pages does she have to read per day if she wants to finish the book six days after the start of reading? How many pages does the book have? - Seamstresses 42451
Eight seamstresses will make the order in 15 shifts. How many will be sewists if they have to complete an order three shifts earlier? - Machineries 42441
Eighty machines weighing 18 kg were loaded per car. How many machines weighing 15 kg will one car take? If the total load mass is to be the same. - John Smith John Smith is reading a 435-page novel. If he reads the same number of pages per day and the number is a prime number greater than 10, how many pages per day will he read?
- How many 11
How many 0.75-pound packages can you make with 6 pounds of sunflower seeds? - Mr. Peter
Mr. Peter mowed 2/7 of his lawn. His son mowed 1/4 of it. Who mowed the most? How much of the lawn still needs to be mowed? - Submerging
Monika dove 9 meters below the ocean's surface. She then dove 13 meters deeper. Then she rose 19 and one-fourth meters. What was her position concerning the water's surface (the water surface = 0, minus values = above water level, plus = above water level - Proportion 42381
If you divide the unknown number x by the number (-4) and divide the resulting proportion by the number (-3), you get -2. What is x? - The elevation
The elevation of a sunken ship is -120 feet. Your elevation is 5/8 of the ship's elevation. What is your elevation? - Miligrams of vitamins
15.38 mg of vitamin C/oz. How much is vitamin C in an orange that weighs 635 oz? - Jerry
Jerry has 3/4 of a pizza. He needs to share it with six friends. What fraction of the pizza will each friend get? Only write the fraction. - Willie
Willie collected 6 2/3 pails of water. How many big containers can she fill? Does each container contain 2 2/9 of a pail? - Missing digit
If 4x/6x + 5/17 = 1, what digit does the x represents - Mike built
Mike built a cylindrical water tank with a radius of about 1.8 m and a height of 2 meters. How many liters of water will it hold? - Alcohol risk
The 2009 Youth Risk Behavior Survey found that about 5 out of 12 high school students drank some alcohol in the 30 days preceding the survey. If a high school has 2400 students, how many would be expected to have used alcohol within 30 days? - Applicants 42261
Of the 4,500 applicants, 2/9 were successful in the university entrance exams. How many applicants were successful? - Kilometers 42251
On the first day, cyclists walked 2/5 of the way, which is 4/35 km. How many kilometers do they have to travel the next day to complete the entire route? - Size comparing
A store sells olive oil in three different sizes. Which size is the best buy, and what is its unit price? Size Price 17 oz $ 8.69 25 oz $11.79 101 oz $46.99 - Two dice
We roll two dice. What is the probability that the sum of the falling numbers is greater than 3?
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