Maths practice for 12-year-olds - page 59 of 355

Number of problems found: 7081

Wheel peripheral speed
Calculate the peripheral speed of the number on the Wheel of Fortune if the wheel rotates within a period of 0.25 seconds and the number is written 1.5 m from the center of the wheel.
Identical cubes
What is the volume of a large cube composed of 27 identical small cubes with an edge length of 3 cm?
Fraction halfway number
Which number is halfway between a quarter of a fifth and a half of a third on the number line?
box orders
You must order 100 wooden boxes from the United States of America. Each box costs $2.35 (dollars). How much will the order cost in £ (GB pounds)? The exchange rate is $1 = £0.70
Triangle sides - natural
In triangle ABC, side a = 30 cm b = 7 cm. The length of the third side in cm is a natural number. What is the least and what is the greatest length that side c can have?
Table paper coverage
The table has the shape of a rectangle with dimensions of 80 × 100 cm. Ten identical sheets of paper measuring 20 x 30 cm lie next to each other on it. Papers do not overlap or extend beyond the surface of the table. What part of the table surface is cove
Tetrahedron segment midpoint
The sum of the lengths of all the edges of the regular tetrahedron ABCD is 48 cm. How many cm is the segment XY if you know that X is AB's midpoint and Y is CD's midpoint?
The teapot
There were 2 liters of tea in the teapot. Dad poured himself a quarter of a liter of tea and Mom half a liter of tea. What part remained in the teapot?
Kilometer fraction meters
How many meters are in 1/5 km?
Bear sleep hours
Misha the bear slept 60 hours in one week. More than he was awake. How many hours per week did Mišo sleep?
Pear basket third
There were pears in the basket. I took a third of them, which was 6 pears. How many pears were in the basket before taking it?
Building shadow height
The school building casts a shadow 16 m long on the plane of the yard, and at the same time, a vertical meter pole casts a shadow 132 cm long. Determine the height of the building.
Segment ratio reduction
I will reduce a segment of length 16 cm in the ratio 7:8, what will its length be in cm?
Pool depth volume
Calculate the depth of a pool that is 10 m long and 5 m wide if its volume is 65 m³
Pole cutting pieces
Mr. Novák needs three wooden poles 21 dm, 350 cm, and 2.8 m long. He needs to cut them into smaller pieces of the same length, as long as possible. How long will he get and how many pieces will he have altogether?
Petr book pages
Petr read ⅜ of the book in the first week, ¼ of the book in the second week, and ⅒ of the book in the third week. The book has 240 pages. How many pages does Peter have left to read?
Aquarium tube filling
Water flows into an aquarium with dimensions of 14x26x3m through a tube with a diameter of 5 cm at a speed of 2m/s. How long does it take for the aquarium to fill with water?
Filip Monika meeting
Filip traveled 15 km from Monika's house to his grandmother's village. Monika can visit him. They meet at the point where the bikes arrive. They both left the house at 9:00. At what time did they meet when Philip was walking at a speed of 19 km/h and Moni
Paver square shifts
Seven pavers would pave the square in 15 shifts. After five shifts, two pavers fell ill. How long will it take for the remaining pavers to finish the job?
Circular segment
A circular segment has an area of 6.04 cm², the central omega angle is 15 degrees, what is the radius?

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