Maths practice for 12-year-olds - page 109 of 355
Number of problems found: 7081
- Venus volume surface
Calculate the volume and surface of the planet Venus if its circumference is 12,000 km. - Truck rail pressure
How much pressure on the rails will cause an empty truck weighing 20 tons if the contact area of all wheels and rails is 16 square centimeters? - Girls money distribution
Three girls have CZK 1,780. Pavlína had 1/3, Eva had 100 CZK less, and Hanka has x CZK. How much money did each girl have? - A pack
A pack of 8 sports drinks costs $5. How much would it cost to buy 72 sports drinks? - Apples 19
Joseph harvested 5 ¾ kg of apples from his garden. He sold ½ of it to his neighbor. How many kgs were sold? - Rocks
Dana loves rocks! She has six pieces of granite, three pieces of marble, 14 pieces of sandstone, and one piece of slate. What is the ratio of sandstone pieces to marble in Dana's collection? - Circumference of a circle
Calculate the area of a circle if its circumference is 21.98 dm. Express the result in square decimetres. - The cyclist - avg speed
The cyclist make a distance of 25 km at an average speed of 20 km/h. How long did the trip take him (in hours and minutes)? - Integer range count
How many integers are less than 74 and greater than -49? - Salaries The employer increased the salaries of its three employees by an average of 30 euros. One increased his salary by € 20, the other by € 45. How many euros did he raise the salary of a third employee?
- Barrel water remainder
There are 1.5 hectoliters of rainwater in the barrel. Two-fifths of the water passed from the barrel while watering the garden. How many liters of water remained in the barrel? - Circumference - diamond
The diamond has an area of 21.6 cm square. Its height is 4 cm. What is the circumference of the diamond? - Create 2
Create word problems based on the given number sentence (300/24) - (207.60/24) = N. - Price discount
The original price of a pen is 9 1/5 dollars. Any purchase of 5 pens needs only 7/10 of the original price. How many dollars should be spent to buy five pens? - Resistor voltage current
A current of 5 mA flows through a resistor with an electrical resistance of 600 Ω. What electrical voltage do we measure between the resistor terminals? - Voltage - Kirchoff laws At a voltage of 2.5V, a current I1= 20mA flows through the resistor. What will the voltage be at the resistor's ends when the current I2= 1,2A passes through it?
- A bamboo
Bamboo is 26 2/5 meters long. If it is cut into 12 pieces, how long will each piece be? - Eva brigade earnings
Eva received money for a brigade. She saved three-fifths of the money, lent one-quarter to her sister, and bought a T-shirt for the remaining 180 CZK. How much CZK did Eva earn on the brigade? - Trapezoid angle construction
Sestroj trapezoid ABCD, if a = 8cm, b = 5cm, alpha = 60 °, beta = 75 ° - Manganese
Manganese bronze contains the following metals per pound: copper 0.89 lb, tin 0.10 lb, and manganese 0.01 lb. How much copper is in a shaft that weighs 235 pounds?
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