Maths practice for 11-year-olds. - page 29 of 230
Number of problems found: 4588
- Dimensions 81850
We used the same amount of paint to paint a cuboid with dimensions of 10 cm, 15 cm, and 3 cm to paint the shell of a cone whose radius is 8 cm. How tall is this cone? Calculate its volume in liters. - Tablecloth 81847
A square tablecloth measures 80 cm so that it protrudes 33 cm on the sides; calculate how big it is. - Calculate 81841
The sum of the lengths of all the cube's edges is 60 cm. How to calculate its volume? - Rectangular 81838
The rectangular pool has dimensions of 12m and 25m. They built a 2-wide sidewalk around the pool and a fence around the sidewalk. How long is the fence if they leave 1 m for the entrance hole? - Approximately 81836
Approximately how many liters of water are there in a pot with a base diameter of 32 cm and a height of 25 cm? - Three-eighths 81827
There were buns for lunch at school. The freshmen ate one-eighth of the buns. The sophomores ate two-eighths of the buns. Third and fourth graders ate three-eighths. How many eighths buns are left for the second stage? - Perimeter 81825
Roland rode his bike around the perimeter of the square plot and traveled 5km. What is the length of the side of a square pitch?
- Understanding 81807
The aquarium is 0.7m long and 25cm wide. The battery is deep if it can hold no more than 87.5 liters of water. I need help understanding how to calculate this. - Purchased 81774 The zoo purchased two aquariums for marine animals. The first can hold 3,577 liters of water. The second aquarium can hold 455 liters less water than the first. How many liters of water can the aquariums hold together?
- Equilateral 81770
Calculate the area of the circle in which the hole is cut in the shape of an equilateral triangle when the diameter of the circle, d=32mm, and the side of the triangle, a=20.8mm. - Cylinder-shaped 81766
The Novákov family bought a cylinder-shaped pool with a base radius of 200 cm and a volume of 31.4 hl. Could the grandson safely jump if he is 120 cm tall? - Fractions 81761
Mom baked cakes. She set aside a third of them for her father. She left the rest on the table. Rišo came and ate a third of the cakes that were on the table. What fraction of all the pies was left on the table? Write the result in fractions. - Compartments 81755
Mr. Milan 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 cuboi - Children 81752
How many nuts would we need at least to divide the nuts equally among 10 or 18 children? - Calculate 81743
Calculate the size of the other side of the rectangle if the size of one of its sides is 90m and the area is 3600 m².
- Substance 81736
What kind of substance is it if it is enclosed in a cube with a volume of 8 m³ weighing 110 kg and the entire cube weighs 115.78 kg? - Children 81732
There are 42 children in the yard, and they want to divide into groups of four. How many groups of four can they make, and how many children will they raise? - Half-circles 81731
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 4m. What distance did he travel? - Pinocchio's 81722
Pinocchio's nose is 11 cm long. If he lies, it will be extended by 10 cm. If he tells the truth, he will be 7 cm shorter. Pinocchio lied 6 times and told the truth 8 times. How long is his nose now? - Diameter 81711
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
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