Maths practice for 12-year-olds - page 167 of 351
Number of problems found: 7018
- The wooden
The wooden block measures 12 cm, 24 cm, and 30 cm. Peter wants to cut it into several identical cubes. At least how many cubes can he get? - Symbolo cards
Peter got a card game for his birthday. On each card there are three symbols. For the cards and symbols the following rules apply: • each symbol is on three cards, • each two cards have exactly one common symbol, • for each pair of symbols, a card can be - Telco company
The upstairs communications company offers customers a special long-distance calling rate that includes a $0.10 per minute charge. Which of the following represents this fee schedule, where m represents the number of minutes and c is the call's overall co - Pool water height
The pool has dimensions of 4.8 m and 65 dm. To what height is water filled in a pool if there is 1,029.6 hl of water in it? - Bricks
How many bricks are needed for a wall 14.5 m long, 2 m high, and 45 cm thick if 285 bricks are needed for one m³ wall? - Landing pad sand
How much sand is needed for a block-shaped landing pad with dimensions: Length 5.25 m, width 2.25 m, and the layer of sand should be 30 cm thick. How many times do we have to turn the cart if we load 0.75 m of sand on the cart? - Into box How many cubes with an edge of 2.5 cm fit into a box measuring 11.6 cm, 8.9 cm, and 13.75 cm?
- Light bulbs
You are in a room with 3 switches. In the next room, there are 3 switched-off classic light bulbs in table lamps; each switch belongs to one light bulb. You cannot see from one room to the other. How do you find out which switch belongs to which light bul - Leader captain selection
How many ways can a 6-member football club member choose a leader and captain from among themselves? - Competition placement options
How many ways could the four participants in the finals of the Pete, George, Martin, and Števo sports competition take the first three places? Write each option. - Trench soil
How many m³ of soil must be moved when digging a straight trench 170 m long, the cross-section of which is an isosceles trapezoid with bases of 150 cm and 80 cm, and arms are 90 cm long? - Parallelogram drawing exercise
Draw an ABCD brassier if a = 4.8 cm b = 3.5 cm and va = 2.9 cm - Nautical miles
How many nautical miles do they sail if the route is shown on a 1:25 000 scale map with a 7.4 cm long line? - Borrowing bicycle
Jacob lent a bicycle to friends who wanted to ride it. For a three-hour bike ride, Jacob received two chocolates. Yup. If you wanted a bike for 2 hours, you had to give Jacob 12 candies. Peter gave Jacob 1 chocolate and three candies. How long can Peter r - Temperature rise and fall
On Friday, the temperature was 82 °F. The temperature changed by –2 °F on Saturday, and then it changed by 5 °F on Sunday. What was the temperature on Sunday? How did the temperature change? Note that we consider the mathematical problem formulated in thi - Number division multiplication
Susan divided 256 by two by two and then multiplied the result by six by 2. What number did she get? - Cyclist meeting
From Děčín and Ústí nad Labem, which are 24 km apart, two cyclists rode against each other at the same time. One drove at an average speed of 28 km/h, and the other, which left Ústí, drove at a speed of 20 km/h. How long did the cyclists meet, and at what - From vacation
Táňa brought from vacation a bag full of seashells, but certainly not more than 300 of them. She wanted to give them to her friends, so she divided them into six equal piles. Then she remembered another friend, so she redistributed them into seven equal p - Candy remaining Eve has four types of candies. He has ten strawberries, and of every other kind, he has candies. How many candies would she have left if she ate two sweets of each type?
- Angle sum puzzle
Jerry had 4 angles written in his notebook, the sum of which was a right angle. The little sister rubberized one corner of it. Determine its size if the remaining angles remain written in the notebook: 12°34, 34°56, 56°9.
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