Math problems

From our database of math problems we offer:

• Cargo
  Weight of cargo car is 761 kg. Weight of car is 23% of the total weight of car+cargo. What is the weight of the cargo load?
• Shirt
  Mrs. Vítková bought each of his three children the same shirt paid CZK 1,000. Saleswoman she returned 568,60 CZK. What was the price of one shirt?
• Pyramid Z8–I–6
  Each brick of pyramid contains one number. Whenever possible, the number in each brick is lowest common multiple of two numbers of bricks lying directly above it. That number may be in the lowest brick? Determine all possibilities.
• Skiing meeting
  On the skiing meeting came four friends from 4 world directions and led the next interview. Charles: "I did not come from the north or from the south." Mojmir "But I came from the south." Joseph: "I came from the north." Zdeno: "I come from the south." W
• Four circles
  1) Calculate the circle radius if its area is 400 cm square 2) Calculate the radius of the circle whose circumference is 400 cm. 3) Calculate circle circumference if its area is 400 cm square 4) Calculate the circle's area if perimeter 400 cm.
• Railway wagon
  The railway wagon holds 75 m³ load. Wagon can carry a maximum weight of 30 tonnes. What is the maximum density that may have material with which we could fill this whole wagon? b) what amount of peat (density 350 kg/m3) can carry 15 wagons?
• Division
  Divide by the number 0.2 is the same as multiply by what number?
• Three numbers
  The sum of the three numbers is 287. These numbers are in a ratio of 3: 7: 1/4 Define these numbers
• Cylinder
  Calculate the dimensions of rotating cylindrical container with volume 2 l, if height of container is equal to the diameter of the base.
• Car factory
  A workshop had produced 25 cars. While they produced about 15 fewer than they had planned. How many cars they produced in the hall yet? How many cars are still to manufacture?
• Painter Pavel
  Painter Pavel painted the fence for 16 hours and painter Petr the same fence painted for 13 h. How long should take painted the fence together?
• Three Titanics
  Three steamers sailed from the same port on the same day. The first came back on the third day, fourth 4th day and the third returned sixth day. How many days after leaving the steamers met again in the harbor?
• School
  27 students of 6.D class is going to a trip. They pay 9 € each. The teacher got 153 €. How many children have not paid?
• Add vector
  Given that P = (5, 8) and Q = (6, 9), find the component form and magnitude of vector PQ.
• Father 7
  Father is 6 times older than his son. After 4 years, the father will only be 4 times older. What are their present ages?
• Logarithmic equation
  Solve equation: log₃₃(3x + 21) = 0
• Simple equations
  Solve system of equations: 5x+3y=5 5x+7y=25
• Decomposition
  Make decomposition using prime numbers of number 155. Result write as prime factors (all, even multiple)
• Pumps A and B
  Pump A fill the tank for 12 minutes, pump B for 24 minutes. How long will take to fill the tank if he is only three minutes works A and then both pumps A and B?
• Sales off
  shoes cost x euros. First they are discounted by 50%, and then 25% of the new amount. Determine what percentage of the total cost is cheaper.