The most viewed math problems

Number of problems found: 5941

  • Percentages above 100%
    cmelak What is 122% of 185? What is the meaning of percentages above 100%?
  • Workers
    workers Two workers fulfill a certain task when working together for 5 days, the first if he worked himself done work in 13 days. How many days will do whole job a second worker?
  • Tetrahedral pyramid
    jehlanctyrboky What is the surface of a regular tetrahedral (four-sided) pyramid if the base edge a=16 and height v=16?
  • Medicament
    tablets Same type of medicament produces a number of manufacturers in a variety of packages with different content of active substance. Pack 1: includes 60 pills of 600 mg of active substance per pack cost 9 Eur. Pack 2: includes 150 pills of 500 mg of active sub
  • Football league
    football In the 5th football league is 10 teams. How many ways can be filled first, second and third place?
  • Greenhouses
    sklenik Two workers would make installation of greenhouses for 54 hours. For how many hours does the installation 9 workers?
  • Children in the classroom
    children-school How many children are in the classroom, where Ladislav is 10th lightest and 16th heaviest in class?
  • Forestry workers
    forestry_workers In the forest is employed 56 laborers planting trees in nurseries. For 8 hour work day would end job in 37 days. After 16 days, 9 laborers go forth? How many days are needed to complete planting trees in nurseries by others, if they will work 10 hours a d
  • Shelf
    bookshelf.JPG How many ways are there to arrange 6 books on a shelf?
  • Balls
    spheres From the urn in which are 7 white balls and 17 red, gradually drag 3-times without replacement. What is the probability that pulls balls are in order: red red red?
  • Scrap
    chair_bad From 6 products are 3 scrap. What is the probability that the random pick of 2 products have no defective product?
  • Cube
    1cube Calculate the surface cube with edge 11 dm.
  • Beer
    piva After three 10° beers consumed in a short time, there is 5.6 g of alcohol in 6 kg adult human blood. How much is it per mille?
  • Rabbits
    kralici In the hutch are 48 mottled rabbits. Brown are 23 less than mottled and white are 8-times less than mottled. How many rabbits are in the hutch?
  • Road repair
    workers_1 Road repair took 10 days for 36 workers if they worked 9 hours a day. How many days take repair same road 37 workers if they work 8 per day?
  • Chocolates
    Chocolate In the market have 3 kinds of chocolates. How many ways can we buy 14 chocolates?
  • Excavation
    vykop_ryha Mr. Billy calculated that excavation for a water connection dig for 12 days. His friend would take 10 days. Billy worked 3 days alone. Then his friend came to help and started on the other end. On what day since the beginning of excavation they met?
  • CDs
    CDs Adam has 6 CDs more than Filip and 7 CDs less than Dominica. Filip has 6 CDs. How many CDs has Adam and how many CDs has Dominika?
  • Cats
    cats Two cats caught two mice in two days. How many mouses will catch 6 cats for 6 days?
  • Candy
    bulls How many ways can divide 10 identical candies to 5 children?

Do you have an interesting mathematical word problem that you can't solve it? Submit a math problem, and we can try to solve it.

We will send a solution to your e-mail address. Solved examples are also published here. Please enter the e-mail correctly and check whether you don't have a full mailbox.

Please do not submit problems from current active competitions such as Mathematical Olympiad, correspondence seminars etc...