Maths practice for 12-year-olds - page 65 of 354
Number of problems found: 7067
- Container painting area
Mr. Milo made a container for sorting waste from wood. The outside will be painted. There will be compartments for plastic and paper on the edges and for glass in the middle. How large areas will he paint with individual colors? The container has a cuboid - Dividing nuts
How many nuts would we need at least to divide the nuts equally among 10 or 18 children? - Water pressure bottom
The hydrostatic pressure at the bottom of a cylindrical water container is 10 kPa. The bottom has an area of 0.25 m². How much pressure does the water exert on the bottom? - Map scale setting
2.5 cm on the map represents 6.25 km in reality. Set the scale of the map. - Cooker electrical work
A cooker connected to a 40 V voltage source draws a current of 0.5 A. Determine the amount of electrical work the cooker does in 3 minutes. - Skier semicircle distance
A skier skis down a black slope. He makes a total of 31 half-circles while going down the hill. The radius of one semicircle is 4 m. What distance did he travel? - Hop picker hiring
Eight hop pickers harvest in 24 days. How many more pickers must be hired if the hops need to be harvested in 16 days? - Glass label paper
We want to stick labels on the glasses. The labels stick right around the glass. The diameter of the cup is 6 cm. The height of the label is 10 cm. a) How many labels will we make from 30 x 40 cm paper? b) How many papers of this size will we use to make - Remote control wood
Calculate how many dm² of wood the craftsman needs to make a block-shaped wooden remote control stand with dimensions of 3.2 dm, 2.4 dm, and a height of 0.6 dm. - Pavel Petra age
The sisters Paul and Patricia are 29 years old together. Paula is 3 years younger than Patricia. HOW old is Pavle? Thank you very much. - Car rental tariff
Mr. Rezek wants to rent an Opel Corsa car for one day. He can choose from two rental tariffs: Tariff 1: Daily flat rate of CZK 1,400. Tariff 2: Daily rental 360 CZK plus 4.50 CZK for each kilometer driven. For what number of kilometers driven is it more f - Number quarter comparison
Hello, this year I am doing the entrance exams for secondary school. I wanted to ask if I have an example: HOW MANY TIMES is a quarter of the number 1.5 smaller than the number 4 1/2, and I don't know what to do with that? HOW MANY TIMES will I add, subtr - Santa gift distribution
Nicholas came to hand out gifts on December 6th and found out that he could hand out gifts to five children in 15 minutes with only one helper. How many minutes did they give out gifts to 40 children if Nicholas called 5 helpers? - Sale of eggs
Mrs. Slepičková sells at the marketplace home eggs in small boxes of 6 pieces and in large boxes of 10 pieces. Over the weekend she sold three times more small boxes than large ones, and at a price of 5 Kč per egg she took in 1680 Kč. For the boxes no pay - Car dealer customers
A car dealer found that 1/2 of his customers bought French, 1/3 of German, and 1/6 (20) American cars. How many customers did the car dealer have? - Runner training duration
How long will training for an endurance runner last if he plans to run 36 km at a speed of 5 m/s and spends 35 minutes warming up? - Cube surface area
What is the largest surface area of a square glued together from 12 identical cubes with an edge length of 1 cm? - Company 5
The Photo-Lab company offers digital photo development in the size 9 × 13 cm for 2 CZK per photo, with a flat handling fee of 50 CZK added to each order (regardless of the number of photos). Calculate the effective price per photo if we order 1, 5, 20, or - Pool water depth
The block-shaped pool is 40 meters long and 18 meters wide. Ten thousand eight hundred hectoliters of water were poured into it. How high is the water in it (how deep is the pool)? - Warehouse painting cost
The warehouse has the shape of a cuboid with dimensions: length of 50 meters, width of 600 decimeters, and height of 300 centimeters. Calculate how much it will cost to paint a windowless room with a door 150 centimeters wide and 200 centimeters high (the
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