Maths practice for 14 year olds - page 186 of 361

Number of problems found: 7217

Cylinder
The 1.8m cylinder contains 2000 liters of water. What is the area (in dm²) of this container is the water?
Express train meeting
At 8:00 a.m., an express train left Bratislava for Poprad, which was 340 km away. At the same time, an express train left Poprad for Bratislava. The express train to Bratislava went at a speed of 80 km/h, and the express train to Poprad went at a speed of
Regular hexagonal pyramid
Calculate the height of a regular hexagonal pyramid with a base edge of 5 cm and a wall height of w = 20 cm. Sketch a picture.
Pyramid volume calculation
Calculate the volume of a regular quadrilateral pyramid whose wall height is w = 12 cm.
Octagonal pyramid
Find the volume of a regular octagonal pyramid with height v = 100 and the angle of the side edge with the base plane is α = 60°.
System equation solving
Solve the system: 15x + 30y = -20 0.3x-0.2y = 0.4
Wall area calculation
A wall is $m metres long and $v metres high. A door $b centimetres high and $d centimetres wide is set into the wall. Find the total area of this wall (excluding the door).
Tetrahedral pyramid
Determine the surface of a regular tetrahedral pyramid when its volume is V = 120 and the angle of the sidewall with the base plane is α = 42° 30'.
Number proportion sum
Please write the number 140 as the sum of two numbers whose proportion is 3.
Pairs of socks
Ferdinand has twelve pairs of socks, and one sock is leaky. What is the probability of putting on a leaky sock?
Integer sum difference
The sum of two integers is three, and their difference is 7. Determine the unknown numbers.
Hexagonal pyramid surface
A regular hexagonal pyramid has a base inscribed in a circle with a radius of 8 cm and a height of 20 cm. Please sketch the picture. Please calculate the surface of a regular hexagonal pyramid.
Pyramid volume calculation
Please calculate the volume of a quadrilateral pyramid when a = 5 cm and the wall height is w = 12 cm.
Dog goose puzzle
Dogs and geese ran around the backyard. Together, they had 12 heads and 30 legs. How many geese ran around the backyard, and how many dogs?
Hexagonal pyramid
Please calculate the height of a regular hexagonal pyramid with a base edge of 5 cm and a wall height of w = 20 cm. Please sketch a picture.
Mary
Mary is 12 years old, which is 40% of the age of her mother. How many percent of her mother's age will Mary have after the next 12 years?
Trio ratio
Hans, Alena, and Thomas have a total of 740 USD. Hans and Alena split in the ratio of 5:6, and Alena and Thomas in the ratio of 4:5. How much will everyone get?
Dessert purchase calculation
Mom bought desserts for her birthday party. The pinwheel cost CZK 14, and the Indian women CZK 11. She paid 201 crowns for 15 desserts. How many pinwheels did she buy, and how many Indians?
The gold coin
The gold coin contains 900 permille of pure gold. The coin weighs 950g. How much permille is gold? How many grams are gold?
Number ratio sum
Write the number 126 as the sum of three numbers whose ratio is 2:5:7

Do you have homework that you need help solving? Ask a question, and we will try to solve it. Solving math problems.