Multiplication + natural numbers - examples

  1. Brick
    brick One brick is 2 kg and half a brick heavy. What is the weight of one brick?
  2. Chocolate
    cokolada Charlie bought 7 same chocolates for 14 Eur. How many euros he pay for 27 chocolates?
  3. Diophantus
    diofantos_1 We know little about this Greek mathematician from Alexandria, except that he lived around 3rd century A.D. Thanks to an admirer of his, who described his life by means of an algebraic riddle, we know at least something about his life. Diophantus's youth l
  4. Textbooks
    textbooks After check of textbooks found that every 8-th textbook should be withdrawn. Together 74 textbooks were withdrawn. How many textbooks were in stock before withdrawn and how many after withdrawn?
  5. No. of divisors
    triangle_div How many different divisors has number ??
  6. Numbers
    ten Determine the number of all positive integers less than 2937474 if each is divisible by 11, 23, 17. What is its sum?
  7. Steps
    square_diagonal_1 How many steps you save if you go square estate for diagonal (crosswise), rather than circumvent on the two sides of its perimeter with 298 steps.
  8. Weeks
    calendar 55 weeks is equal to how many days?
  9. Camp
    skauti In the camp are children. 1/4 went on a trip, 1/2 went to bathe and 99 children remained in the room. How many children are in camp?
  10. Chocolate
    cokolada_1 How many times should be broken chocolate consisting of 7 × 10 pieces to get the 70 parts?
  11. Shelf
    bookshelf.JPG How many ways are there to arrange 9 books on a shelf?
  12. LCM
    calc_icon What is the least common multiple of 28, 42, 22?
  13. Pension or fraud
    dochodca_icon Imagine that your entire working life working honestly and pay taxes and to Social Insurance (in Slovakia). You have a gross wage 910 Euros, you pay social insurance (you and your employer) monthly € 319 during 43 years and your retirement is 410 Eur.
  14. Chocolates
    Chocolate In the market have 3 kinds of chocolates. How many ways can we buy 13 chocolates?
  15. Candy
    bulls How many ways can divide 22 identical candies to 4 children?
  16. Divisibility
    dots Determine the smallest integer which divided 8 gives remainder 6 when divided 19 gives remainder 9 and when divided by 11 gives remainder 2.
  17. Count of roots
    eggs How many solutions has equation x. y = 2531 with two unknowns on the set of natural numbers?
  18. Bus driver
    bus_2 The bus driver rides 191 km in the morning, afternoon rides 22 km more. How many kilometers traveled in 5 days if he rides on the same line?
  19. Three digits number
    plot How many are three-digit integers such that in they no digit repeats?
  20. Divisors
    one Find all divisors of number 418. How many are them?

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