Maths practice for 12-year-olds - page 208 of 347
Number of problems found: 6923
- Diameter of cent coins
In what proportion are the diameters of these coins: 10 cents-diameter 19.75 mm 20 cents-diameter 22.25 mm 50 cents-diameter 24.25 mm - Step count
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? - Drain Holes Reduction
I will drain the whole tub in 4 minutes. How long would it take to drain it if I added two more drain holes? - Driver Speed Increase Time
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? - Workers Days Hop Garden
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? - Saving for an apartment
The Adamec, Benda and Cibulka families began saving for an apartment priced at 750 000 Kč in January 1997. The Benda family had 250 000 and save 4 000 Kč monthly; the Adamec family had 370 000 Kč (Kč is Czech crown) and save 6 000 Kč monthly; the Cibulka - 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? - Three Inlets Fill Time The pool is filled with three identical tributaries in 12 hours. In how many hours will only two tributaries fill it?
- Cable Digging People Days
In 12 days, ten people will dig a 3 km cable car. In how many days will five people dig it up? - Basket bun sharing
There were 16 buns in the basket on the table. Josef ate half of it, Eve ate the rest, and Duncho ate it. How much did Dunco eat? - Dividing Money Given Ratio 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 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. - Spruce wood
Calculate the weight of an edge made of spruce wood 6 m long when the cross-section of the edge is 146 cm square and if the density of the wood is 0.55 grams/cm cubic. - Horizontal distance
The road has a gradient of 8%. How many meters will it rise over a horizontal distance of 400 m? - Lumberjacks
Fifteen lumberjacks would take 12 days to destroy the broken trees. How many days would this work require if the company added five workers to it after four days? - Cube QR Codes Area
Peter built a cube in Ostrava, each wall with a unique QR code. The edge of the cube is 107 cm long. Calculate how large an area its author had to cover with white and black. - Calories 2
Ben eats approximately 2400 calories per day. His wife Sarah eats 5/8 as much. How many calories does Sarah eat per day?
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