Math practice for 13 year olds - page 137 of 419
Number of problems found: 8380
- A paint
A paint tin is a cylinder of 12cm and a height of 22 cm. Leonardo, the painter, drops his stirring stick into the tin, and it disappears. Work out the maximum length of the stick. - Nice two numbers
What two numbers do we give a sum of 30, a difference of 24 products of 81, and a quotient of 9? - I-beam
If an I-beam is 12'- 6 1/2" long and needs to be cut into four equal sections, how long will each section be? - Children and horses
There are some children and horses in a field. Together they have 39 heads and 122 feet. How many children are in the field, and how many horses are in the field? - Wall builders
If 12 men can build a wall 398 meters long in 48 days, how long would it take 33 men to build a wall 347 meters long? Answer to 3 decimal places. - Different 55491
Add the same numbers after the same letters and different numbers after the other letters so that equality applies: KRAVA + KRAVA = MLIEKO, where K is an odd digit. - Four-digit 55481
Find all four-digit abcd numbers to which abcd = 20. ab + 16. cd, where ab and cd are double digits numbers from digits a, b, c, and d. - Decimal to percentages
A) What is 1.18 as a percent? B) What is 0.38 in percent notation? C) Write 65% as a fraction. Simplify. - Construction 55441
By improving the work process, constructing a family house saved CZK 111,600, which was 5% of the total budget. What was the original budget for a family house? - Central Park
Central Park is a rectangular park in New York City, and the map scale is 1 cm: 320 m (It means 1 cm on the map represents 320 m in the real world. ). Find the north-south distance if the length on the map is 2.5 cm. - Marshall
Marshall earns a salary of 36,000 each year and receives a $4000 raise. Jim has a salary of 51,000 yearly, receiving 1500 bonuses. How many years will it take before Marshall and Jim are on the same salary? - Cinema - tickets
Ivan went to the cinema with his friends. He bought five tickets for 57 cents, two popcorn for 66 cents, and 6 Coca-Cola for 1 euro and 9 cents. He paid with a twenty-euro bill. How many cents does he have left? - The base
The base of the quadrilateral prism is a trapezoid with an area of 75 cm square. The prism is 6 cm high. Find the volume of the prism. - A concert
A concert will take place at the stadium. If they sold 1/4 ticket on the first day, 2/5 of the rest on the second day, and 17,100 tickets left in the box office. What is the capacity of the stadium? - Bridge across the river
The width of the river is 89 m. For terrain reasons, the bridge deviates from a common perpendicular to both banks by an angle of 12° 30 '. Calculate how many meters the bridge is longer than the river. - Describes 55223
The minute hand is 30 cm long. The hour hand is half as short as the minute hand. How big a track describes its endpoint in a week. - Semicircle
The ornament consists of one square and four dark semicircles. The area of the square is 4 cm². Find the area of one dark semicircle and round the result to hundreds. - Aluminum cylinder
The aluminum cylinder weighs 1400 g and is 26 cm high. Its density is 2700 kg/m³. Calculate the base area of the cylinder and express the result in cm². - A vendor
A vendor bought an article for $900 and sold it for $1260. What is the profit percentage? - Lunapark
At the county fair, rides cost $5 plus $2. Use the expression 5 + 2r to determine how much Sheila will spend if she goes on seven rides.
Do you have unsolved math question and you need help? Ask a question, and we will try to solve it. We solve math question.
