Math practice for 13 year olds - page 299 of 413
Number of problems found: 8254
- Ratio 11
Simplify this ratio 10: 1/4 - Cuboid - volume and areas
The cuboid has a volume of 250 cm3, a surface of 250 cm2, and one side 5 cm long. How do I calculate the remaining sides? - Apple weight
The box with apples weighs x kg. Empty box y kg. How many kilograms of apples are in twenty boxes? - Event comparison
Compare the odds of pairs of events. A) Slovakia will be the world champion in ice hockey 2 times in a row. B) You will write all the papers this year with at least a double. C) In two years, humans will be on Mars. D) Someone in your class will write all - Type of triangle
How do you determine the type of triangle if the angle ratio is 2:3:7? - Mirror
How far must Paul place a mirror to see the top of the tower 12 m high? The height of Paul's eyes above the horizontal plane is 160 cm, and Paul is from the tower distance of 20 m. - Cuboid walls
Calculate the cuboid volume if its different walls have an area of 195cm², 135cm², and 117cm². - Three-digit numbers
How many can you create three-digit numbers from the numbers 1,3,5,7 if we must not repeat the numbers? - Calculate the pool
Calculate how many square metres of lining are needed for a pool 6 m long, 4 m wide, and 1.5 m deep. Add 10% for waste. - Tank diameter
The cylinder tank is 8 meters long and contains 40 cubic meters of petrol. What is its inside diameter? - Similarity coefficient
The triangles ABC and A'B'C' are similar to the similarity coefficient 2. The sizes of the angles of the triangle ABC are α = 35° and β = 48°. Find the magnitudes of all angles of triangle A'B'C'. - Average speed 4
Starting at home, Tony traveled uphill to the store for 45 minutes at 8 miles per hour. he then traveled back home on the same path at a speed of 24 miles per hour. What is his average speed for the entire trip? - Clocks
The length of the minute hand is 12 cm. What track in meters will its endpoint describe in a week? - Cuboid height
What is the cuboid's height if its base edges are 15 cm and 4 cm long and its volume is 420 cm³? - Rectangle sides
The rectangle's width is 20 percent shorter than its length. Its perimeter is 22 cm. What are the dimensions of the rectangle? - Friction coefficient
A body weighing 150 kg pulls with a force of 375 N. What is the coefficient of friction? - Prism dimensions We will double one block dimension and reduce the other by a third. How does its volume change?
- The barrel
The barrel is 135 cm high. If we fill it to a height of 60 cm, it weighs 163 kg. If we fill it to a height of 80 cm, it weighs 213 kg. How many kilograms weigh a full and how many empty barrels? - Rectangle 35
Find the rectangle area when the diagonal is equal to 30 cm and the width is double the length. - Circle and rectangle
The circle describes a rectangle with sides of 11.7 cm and 175 mm. What is its length? Calculate the area of the circle described by this circle.
Do you have unsolved math question and you need help? Ask a question, and we will try to solve it. We solve math question.
