Maths practice for 12-year-olds - page 206 of 350

Number of problems found: 6986

Together 8086
The first tiler would cover the inside of the pool in 5 working days, and the second would need seven working days for the same work. In how many days would they line the inside of the pool together?
Calculated 8085
Roza calculated that if she read ten pages a day, she would read the whole book in 18 days. After a week, however, she decided to read one more page a day. How many days will he read the entire book?
Diameter of cent coins
In what proportion are the diameters of these coins: 10 cents-diameter 19.75mm 20 cents-diameter 22.25mm 50 cents-diameter 24.25mm
Meeting 8082
George makes steps 60 cm long. He will take 1530 steps on the way to school. How many steps will his father take to the class meeting if he makes steps 85 cm long?
Minutes 8081
I will drain the whole tub in 4 minutes. How long would it take to drain it if I added two more drain holes?
Distance 8080
The driver covered the distance between the two cities in 2 hours at an average 75 km/h speed. How did he change speed to get 20 minutes faster?
Cleaning the pool
The swimming pool is 25 m long, 12 m wide, and 2 m deep. The walls and bottom of the pool require regular cleaning. The company that cleans the pool charges CZK 50 per 1 square meter. How much does the owner pay for cleaning the pool?
The King
The King wants to divide his sons equally. He has 42 rubies and 45 diamonds. How many sons and how will they share them?
Four workers
Four workers lay on the gym floor for six hours. After an hour of working together, one of the workers went to the doctor. How long will it take for the remaining three workers to complete their work?
Twenty-four 8069
Twenty-four combers combed the hop garden in 6.5 days. How many combers would have to work on combing the hop garden in 5 days?
Difference of a half
Calculate three times the half difference of 7.5 and 2.1,
Area of rectangle
If we increase the length by twice and decrease the width by half, how many times will we increase the area of the rectangle?
Tributaries 8056
The pool is filled with three identical tributaries in 12 hours. In how many hours will only two tributaries fill it?
People 8055
In 12 days, ten people will dig a 3km cable car. In how many days will five people dig it up?
Basket 8054
There were 16 buns in the basket on the table. Josef ate half of it, Eva ate the rest, and Duncho ate it. How much did Dunco eat?
Employees 8053
The company paid three employees 50 euros, 100 euros, and 60 euros. They are to receive a total of 735 euros for further work. How will they divide this amount if it is divided in the ratio as in the first case?
Midpoint of the line segment
Length of lines MG = 7x-15 and FG = 33 Point M is the midpoint of FG. Find the unknown x.
Midpoint 6
For line segment length is given: FM=8a+1, FG=42. Point M is the midpoint of FG. Find unknown a.
Midpoint 5
FM=3x-4, MG=5x-26, FG=? Point M is the midpoint of FG. Use the given information to find the unknown measure or value.
Find midpoint
FM=5y+13, MG=5-3y, FG=? M is the midpoint of FG. Use the given information to find the missing measure or value.

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