Maths practice for 12-year-olds - page 326 of 362
Number of problems found: 7223
- Soil pit
Workers dug a pit cube with an edge of 2.5 meters. How many cars shall remove soil if the car suddenly takes 4 m³ of soil? - Motion 2
At 10 o'clock started car from place A at speed at 90 km/h, twenty minutes after starting another car from place B at a 60 km/h speed. The distance between places A and B is 120 kilometers. What time and where do they meet? - Vacation
Parents are piggybacking their children on vacation to their grandmother and grandfather in a city that is 150 kilometers away. They agreed to meet halfway. Parents will travel at 90 km/h, and grandmother and grandfather will travel at 60 km/h. Parents de - Cars motion
From A point car starts at the speed of 90 km/h. Against it departs from point B at the same time another car at 60 km/h. How long and where do they meet if the distance between A and B is 180 km? - Unknown number
Samuel wrote the unknown number. Then he had to add 200000 to the number, and the result was multiplied by three. When it was calculated, he was surprised because he would have received the result if he had written the digit to the end of the original num - Base, percents, value
The base is 344084, which is 100 %. How many percent is 384177? - Three friends
Divide 570 euros among three friends so that the first gets 50 euros less than the second and the third twice more than the first. How many euros will everyone get?
- Infirmary
Two-thirds of the children from the infirmary went on a trip, a seventh went to bathe, and 40 children remained in the gym. How many children were treated in the infirmary? - Shop stores
Workers delivered fruit to stores. In the first, they deposited a quarter of the shipment. In the second, a fifth of the shipment. In the third, two-fifths of the rest, and in the fourth, 231 kg. How many fruits were there altogether? - Athlete
How long length an athlete run when the track is a circular shape radius of 120 meters, and an athlete runs five times in the circuit? - Pytagoriade
Two fifth-grader teams compete in math competitions - Mathematical Olympiad and Pytagoriade. Out of 33 students in class 5A, 22 students competed in at least one of the competitions. Students who competed only in the Pytagoriade were twice as many who jus - Circle - simple
The circumference of a circle is 683 mm. How long in mm is its diameter? - Travel by bus
Five girls are traveling by bus. Each holds in each hand two baskets. Each basket contains five cats. Each cat has five kittens. Three girls get off the bus, and another girl without baskets goes on board. The bus control driver. How many legs are on the - Tons of coal
The coal hopper has a capacity of 285 liters. How many tons is it? The bulk density of coal is 911 kg/m³. - Chord 4
I need to calculate the circumference of a circle, and I know the chord length c=22 cm and the distance from the center d=29 cm chord to the circle.
- Five girls
Five girls are traveling by bus. Each holds in each hand two baskets. In each basket are four cats. Each cat has three kittens. Two girls exit the bus. How many legs are on the bus? - Grandson and granddad
Grandson with Grandpa counted how many years they had together. Their product is 365. How many years is the sum of their years? - Water lake
The length of the lake water is 8 meters, width 7 meters, and depth 120 centimeters. How many liters of water can fit into the water lake? - Masons
One mason casts 30.8 meters square in 8 hours. How long casts four masons 178 meters square? - Examples 1895
Examples of direct ratios from the given report topics: Number of workers Number of products Time per product Number of working hours Amount of earnings
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