Maths practice for 12-year-olds - page 41 of 350
Number of problems found: 6990
- A triangle 8
A triangle has a base of 9.2 feet and a height of 4.8 feet. What is the area of the triangle? - Unit price
A 4-ounce bottle of soap costs $1.37. What is the unit price, rounded to the nearest cent? - Mary read
Mary read 2/9 books in the morning and 5/9 in the evening. What fraction of books has she read? - What number
What number must be added to both the numerator and denominator of 3/5 to get 5/6? - Electronic price decrease
Each year a store decreased the price of a specific TV model by $35. If the price in 2001 was $1,950, what was the price in 2009? - Five times Five times a number divided by three is ten. What is the number? a.5 b.6 c.7 d.8
- The volume 7
The volume of a cylindrical can is 75.36 in³. The diameter is 4 inches. Find the height. Use 3.14 as an estimation for pi. - Whole part 35/16 = 2.1875. What is the whole number of this decimal?
- A mixed school
In a mixed school, 5/9 of the pupils are boys. If there are 128 girls, how many pupils are there altogether? - A decimal A decimal rounded to 2 decimal places is 5.32. This decimal has 3 decimal places. What is the greatest possible decimal?
- Iron ball 2
What is the mass of the iron ball with a diameter of 1,0 dm? The density of iron is 7870 kg/m³. . - Rita bought
Rita bought a school shirt for $16.99, a pair of white gym shorts for $12.95, and a white T-shirt for $9.90. She turned in a voucher for $8.75. If she pays her bill with two 20 - dollar notes, what change did she receive? - The miniature
The miniature golf scores for 7 friends are 23, 30, 39, 32, 35, 14, and 23. What is the mean golf score for this group of friends? - The special
The special mix contains 5/6 pounds of dried chicken, 2/3 pounds of dried bison, and 1/2 pounds of dried vegetables. How many pounds of the special mix does Max get? Explain how you found your answer. - Electrical 11
An electrical device produces 4.2 MJ of work per hour at an efficiency of 0.53 (53%). What is the power input of this device? - Calculate 258
Calculate the volume and surface area of a prism with a trapezoidal base and a height of 9 cm. The base is an isosceles trapezoid with bases of lengths 3 cm and 6 cm and arms of length 2.5 cm. The height of the base is 2cm. - At night
On the night from Thursday to Friday, the temperature on the thermometer dropped to −7°C. On Friday at noon, the temperature rose by 13°C, and in the evening, the temperature dropped by 11°C. On Friday evening, the thermometer showed the temperature: - In the middle 2
In the middle between the unknown number and the number 30 is the number 12. Determine the unknown number. - From the intersection
From the intersection to the school is 6/5 km, to the shop 9/10 km, to the bank 5/8 km, and to the park 21/8 km. Which place is closest to the intersection? - Asphalt - rolling
A roller for rolling asphalt has a diameter of 80 cm and a width of 1.2 m. How many square meters of road does it roll if it turns twenty times?
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