Maths practice for 12-year-olds - page 242 of 347
Number of problems found: 6932
- Tank filling
The tank is filled in 1 hour and 12 minutes with a pump with a capacity of 25 l/s. How long does filling the tank with a 20 l / s pump take? - Sound Distance Time Table
Sound travels in the air at a speed of 330 m/s. Build a table of the dependence of the distance the sound travels in a given time (for 1 to 10, one second at a time). Write the equation of the relevant dependence. - Sharing Money by Ratio
Hansel, Karel, and Martin shared the money from the brigade in a ratio of 2:4:3. Karel received the most, namely 12.60 euros. How much did Hansel and Martin get together? - Package Weight Total Kilograms
The courier brought four packages to the company that weighed 3.5 kg, 2 1/5 kg, 3/4 kg, and 250 g. How much did all the packages weigh together? Give the result in kilograms and write it as a decimal number. - In the Gargen
Workers will pave a 1-meter-wide sidewalk in the garden with tiles around the block-shaped pool. The dimensions of the bottom of the pool are 8.5 meters and 6 meters. The height of the pool walls is 2 meters. How many m² of pavement will be laid with tile - Bitoo and Reena
Bitoo ate 3/5 part of the apple, and the remaining part was eaten by his sister Reena. How many parts of an apple did Renna eat? Who had the larger share? By how much? - Tallest and shortest
Jenn is the tallest on the team. He is 1 1/2 times as tall as the shortest girl, who is 4 1/4 feet tall. How tall is Jebb? - Beet Yield Per Hectare
A private farmer assumed a beet yield per hectare of x tons. He harvested an average of y tons more per hectare. How many tons of beets are harvested from 0.25 km²? - Rabbit hay
Twenty rabbits have hay for 60 days. For how many days will five rabbits have them? - Steps Length Corridor
A mature man, whose step is 3/4 m long, crossed the corridor 46 steps. How many steps will a boy with 60 cm long steps take her? - Five pumps
The water tank is filled with two pumps in 48 minutes. How long would it take to fill it with five same pumps? - Cylinder-shaped vase
If the cylinder-shaped vase is filled with water up to 35 cm, it contains 1 liter of water. How much water will it contain if it is filled to a height of 45cm? - Olda wanted
Oldrich wanted to enlarge the 9 cm x 13 cm photo so that the shorter side measured 18 cm. How big will the longer side of the photo be? - Volume of cone
Find the volume of a right circular cone-shaped building with a height of 9 m and a radius base of 7 m. - Twelve
Twelve students work on a week forestry brigade. One hundred spruces will receive x CZK, one hundred pine y CZK. How many receive each student in one day if they planted a total of 25,000 spruces per week and 30,000 pine trees? Express by expression. - Halves of Fractions Tenfold
What is half of 3/8 and 9/4? And write ten times bigger numbers. - Pupils' exercise
On part of the school playground there are embedded markers. Neighbouring markers are 60 cm apart from each other and form a square grid. The teacher said: line up on the markers in rows of three. Change places into rows of four. Stand in rows of six. We - Embassy Reception Languages Spoken
At the embassy reception, everyone knows at least one foreign language: 15 people speak English 12 people speak German 7 both How many people does this society consist of if no one speaks another language? - Annual rainfall
The average annual rainfall is 686 mm. How many liters will fall on the 1-hectare field? - Expression sum calculation
The expressions A = 8x + 17, B = -12x-12, C = 9x-10 are given. Two-fifths of the sum of expressions A, B, and C are equal ...
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