Multiplication + natural numbers - examples

  1. Brick
    brick One brick is 6 kg and half a brick heavy. What is the weight of one brick?
  2. Chocolate
    cokolada Juan bought 9 same chocolates for 9 Eur. How many euros he pay for 29 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. No. of divisors
    triangle_div How many different divisors has number ??
  5. Textbooks
    textbooks After check of textbooks found that every 10-th textbook should be withdrawn. Together 58 textbooks were withdrawn. How many textbooks were in stock before withdrawn and how many after withdrawn?
  6. Numbers
    ten Determine the number of all positive integers less than 4183444 if each is divisible by 29, 7, 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 307 steps.
  8. Weeks
    calendar 33 weeks is equal to how many days?
  9. Camp
    skauti In the camp are children. 1/2 went on a trip, 1/4 went to bathe and 58 children remained in the room. How many children are in camp?
  10. Shelf
    bookshelf.JPG How many ways are there to arrange 6 books on a shelf?
  11. Chocolate
    cokolada_1 How many times should be broken chocolate consisting of 10 × 12 pieces to get the 120 parts?
  12. Chocolates
    Chocolate In the market have 4 kinds of chocolates. How many ways can we buy 23 chocolates?
  13. LCM
    calc_icon What is the least common multiple of 10, 30, 48?
  14. 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 1110 Euros, you pay social insurance (you and your employer) monthly € 333 during 42 years and your retirement is 522 Eur
  15. Candy
    bulls How many ways can divide 16 identical candies to 4 children?
  16. Divisibility
    dots Determine the smallest integer which divided 11 gives remainder 4 when divided 15 gives remainder 10 and when divided by 19 gives remainder 16.
  17. Bus driver
    bus_2 The bus driver rides 175 km in the morning, afternoon rides 20 km more. How many kilometers traveled in 5 days if he rides on the same line?
  18. Count of roots
    eggs How many solutions has equation x. y = 7757 with two unknowns on the set of natural numbers?
  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 493. How many are them?

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