Maths practice for 12-year-olds - page 261 of 359
Number of problems found: 7167
- Unknown number
If we increase the unknown number by 4%, we get 780. Determine the unknown number. - Wide field
The field is 203 meters wide and 319 meters long. What is the greater length of the rope by which length and width can be measured? Find the exact number of times. - Two ages
Gabrielle is nine years younger than Mikhail. The sum of their ages is 87. What is Mikhail's age? - Tickets 3
A total of 645 tickets were sold for the school play. They were either adult tickets or student tickets. The school sold 55 fewer student tickets than adult tickets. How many adult tickets were sold? - Sale off 2
A pair of blue jeans went on sale. After a 30% reduction, the pants cost $35. How much did the jeans cost before the price reduction? - Quotient 3
What is the difference if the quotient of 8/13 and 2 is subtracted from the product of 1 3/4, and 8/21? - Pool filling
In how many hours approximately we will fill the pool 3.66x0.91 (water height 71 cm) with a hose 1/2 from the valve from the water distribution from the well where there is enough water, a quality pump, and a water supply made through pipes in the cottage - Lcm of three numbers
What is the Lcm of 120 15 and 5 - One deci
Wine 0,375 l costs 2040 CZK. How much does one dl cost? - Trench
The trench is a four-sided prism. The cross-section has a trapezoidal shape with bases of 4 m and 6 m, and the length of the trench is 30 m. What is the depth of the trench if we dig 60,000 l of soil? - Tree shadow 3
A 2-meter rod casts a shadow 3.2 m long. How high is a tree with a shadow of 14.4 m? - Two boats
The sightseeing boat sailed at 25 km/h. The cruise takes 6 hours. How long does another boat sail at 60 km/h? - Pond
Workers will empty a pond with two open floodgates in 20 days. A larger floodgate will empty the whole pond in 30 days. For how long would he be emptied with a smaller floodgate? - Pumping
The tank is filled with a larger pump in 12 hours and with a second pump in 15 hours. For how long does the tank fill when both pumps are switched on at the same time? - Natural numbers
How many natural numbers can we create less than 301 from the number 0,1,2,3,6,7? - Fence elements
Mr. Winter is building a fence from perforated brick elements in the shape of a cuboid with dimensions of 15 cm, 15 cm, and 20 cm. the fence will be 15 cm wide, 150 cm high, and 10 m long. The mortar space will occupy 0.25 m³. How many brick elements does - Pins 2
How many different possible four-digit pins can be found on the 10-digit keypad? - A map
A map measuring 60 cm by 25 cm is reduced in the ratio 3:5 twice. What are the new dimensions? - Cuboid
Cuboid has a surface of 516 cm². Side a = 6 cm and b = 12 cm. How long is the side c =? - Well volume
The well has the shape of a cylinder with a base diameter of 1.2 m. From the surface to the surface, it is 4 m, and the water depth is 3.5 m. How many m³ of soil had to be dug when digging the well? How much water (in cubic meters - m3) is in t
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