Maths practice for 12-year-olds - page 214 of 355
Number of problems found: 7083
- A metal
A metal cylinder is inserted into the cube with a 20 cm edge so that the cylinder shell. Its two bases are in close contact with the cube's walls from the inside. How much water could be poured into the free space between the cube and the cylinder so that - Cylinder pot
The cylinder-shaped pot has a bottom diameter of 28 cm and a height of 36 cm and is two-thirds full of tea. Will this tea be enough for 50 children if we serve it in full 3 dl glasses? - Water container transfer
Is it possible to pour water from a full cube-shaped container measuring 8 cm, 10 cm, and 12 cm into a cylindrical container with a bottom diameter of 12 cm and a height of 8 cm? - Cylinder Paint Weight Area
The sheet metal keg for oil transport has the shape of a cylinder with a volume of 62.8 liters and a height of 0.5 m. How many kg of paint do we need to paint if we need 1 kg of paint for 1.5 m²? - Raspberry juice
The children from the scout troop went to a restaurant for refreshments after the trip, where each child ordered one of three drinks - raspberry juice, sparkling water, and kofola. A fifth of the children had raspberry juice, five children ordered sparkli - Pumps
After the floods, four equally powerful pumps exhausted water from the flooded cellar in 6 hours. How many hours would it take to drain out with three equally powerful pumps? - Round-trip
A woman works at a law firm in city A, about 50 miles from city B. She must go to the law library in city B to get a document. Find how long it takes her to drive round-trip if she averages 40 mph. - Hikers Meeting Time Route A tourist would cover the route from Skalnate Pleso to Hrebienok at a constant speed in 2 hours. His friend would walk the same route from Hrebienk to Skalnaté Pleso in 3 hours. When will they meet if they both go hiking at 9:00?
- Cube Volume from Surface
The surface of the cube is 61.44 cm². Calculate its volume. - Clock Hands Angle Ten
The hour and minute hands on the clock face make an alpha angle. If you know it's 10 hours and 12 minutes, what is the angle's size? - Construction of the road
Six trucks are supposed to be transported for 18 days to construct the road dam. After three days, the transport company sent two more cars to the construction site. How long will it take to carry the material? - Solve Linear Equation
Solve the equation with the unknown a: 3 (2a + 1) = (a-3) • 4-5 - Greg and Bill Greg is 18 years old. He is six, less than four times Bill's age. How old is Bill?
- Double and triple Find the number to which it is true: Its double is five less than its triple.
- Sum of dividend
Suppose X is divided separately into 2.63 and 1.40. The results of the individual divisions are added to give a result less than X. What is X? - Middle number puzzle In the middle between the unknown number and the number 166 is the number a) 164, b) 200, c) 500 d) 1356 What are the unknown numbers?
- Number expression comparison
Which number is 2a-b smaller than a + 2b? - Family age calculation
Dad is r years old, and Mom is two years younger. The son is 20 years younger than the father. How old are they? - Half-sphere roof
The roof above the castle tower has the shape of a 16 m diameter half-sphere. What is this roof's cost if the cost of 1 square meter is 12 euros and 40 cents? - Hemisphere of ice-cream
The ice cream maker sold 6l of ice cream a day. How many hemisphere-shaped portions with a diameter of 6 cm could he make from the ice cream sold?
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