Maths practice for 12-year-olds - page 297 of 298
Examples and word math problems for 7th grade.Number of problems found: 5942
- Drunk man
The drunk man has 2.6‰ of alcohol in his blood. How many grams of alcohol has in his blood if he has 5 kg of blood? - Cube wall
The surface of the first cube wall is 64 m². The second cube area is 40% of the surface of the first cube. Find the length of the edge of the second cube (x). - Scientists from the Social Insurance
Aaron became sick leave, and social insurance granted him sick leave of 13.8211695 EUR per day. Calculate the number of days to save Aaron from rolling in the price of 0.1 Eur if they postpone the amount of the last decimal place of his sickness every day - Triangles
An equilateral triangle with a side 16 cm has the same perimeter as an isosceles triangle with an arm of 23 cm. Calculate the base x of an isosceles triangle.
- Ladder
Ladder 8 m long is leaning against the wall. Its foot is 1 m away from the wall. At which height does the ladder touch the wall? - Percent calculation
Calculate 8% if 44% is 32. - Car inflation
What percentage of car price increases if the price rises from €1880 to €2200? - Two numbers
Find two numbers whose difference and the ratio are $n. - Acid
The barrel is 199 liters of 38% acid. How many percent of acids occur when 61 liters revoke and replaced with the same amount of water?
- Ratio
6 numbers are in the ratio 1:5:1:5:5:5. Their sum is 242. What are the numbers? - Election mathematics
In elections, 12 political parties received this shares of voters: party A 56.2 %party B 8.5 %party C 8.2 %party D 6.2 %party E 6.1 %party F 5.5 %party G 3.2 %party H 2.1 %party I 2 %party J 1 %party K 1 % Calculate what the shares acquired in the parliam - Salary raise
The monthly salary was 620 Eur. During the year, it was raised to 727 Eur. Calculate the month from salary was increased that employee earned 7547 Eur during the whole year. - Bicycle wheel
A bicycle wheel has a diameter of 60 cm. Approximately how many times does the wheel rotate at a 2.5 km long trip? - Report card
Ivor hit 4× grade 5 at the beginning of the school year. How many times must you now catch grade 1 to get grade 2 on the report card?
- N-gon angles
What is the sum of interior angles 8-gon? What is the internal angle of a regular convex 8-polygon? - Reconstruction of the corridor
Calculate how many minutes will be reduced to travel a 167 km long railway corridor, where the maximum speed increases from 120 km/h to 160 km/h. Calculate how many minutes will shorten travel time if we consider that the train must stop at 6 stations. Ea - Ultra expensive ramps
The village Čakajovce have two-level railway crossings (the ramps), the railway company ZSR decided to replace it. The price for upgrading the two crossings is 302065 Euros. Calculate how we can obtain many houses for 77000 euros at this price. Calculate - Right triangle Alef
The obvod of a right triangle is 84 cm, and the hypotenuse is 37 cm long. Determine the lengths of the legs. - Trolleybus
Trolleybus line No. 206 measured 24 km. If the trolley bus goes faster by 5 km/h, the way there and back would be shorter by 33 minutes. Calculate the trolley bus speed and the time it takes for a return trip.
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