Equation - examples

Do you have a linear equation or system of equations and looking for its solution? Or do you have quadratic equation?

  1. Cuboid and eq2
    kvader11_2 Calculate the volume of cuboid with square base and height 6 cm if the surface area is 48 cm2.
  2. Average speed
    bus27_4 When the bus stops at bus stops driving average speed is 45 km/h. If it did not stop it drive at speed 54 km/h. How many minutes of every hour it spend at stops?
  3. Diagonals of a rhombus
    rhombus-diagonals_1 One of the diagonals of a rhombus is twice as the other. If the sum of the lengths of the diagonals is 24, find the area of the rhombus.
  4. Pharmacy
    roztoky_3 The pharmacy add to 3 liters of 95-percent alcohol 5 liters of 38.04 percent alcohol. How many percent pharmacy got?
  5. Time gone
    family_6 Square of Richard age equals the age of his mother. When he will bw two times older then his mom will be 7/2 times older than he. How old is Richard and his mom?
  6. Right triangle eq2
    rt_2 Hypotenuse of a right triangle is 9 cm longer than one leg and 8 cm longer than the second leg. Determine the circumference and area of a triangle.
  7. Pets in ZOO
    chicken_3 The zoo have run for pets. They are chickens, pigs and cow. Altogether there has 20 heads and 60 feet. How many chickens and piglets are there?
  8. Chocolate
    cokolada Frank bought 6 same chocolates for 12 Eur. How many euros he pay for 19 chocolates?
  9. Inflation
    dollar What is better for people (employees)? ?
  10. Brick
    brick One brick is 2 kg and half a brick heavy. What is the weight of one brick?
  11. Root
    root_quadrat The root of the equation ? is: ?
  12. Proof PT
    pytagoras Can you easy prove Pythagoras theorem using Euclidean theorems? If so, do it.
  13. Troops
    regiment Route is long 203 km and the first day first regiment went at an average speed 20 km/h and journey back 19 km/h. The second day went second regiment same route at an average speed 18 km/h there and back. Which regiment will take route longer?
  14. 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    textbooks After check of textbooks found that every 8-th textbook should be withdrawn. Together 74 textbooks were withdrawn. How many textbooks were in stock before withdrawn and how many after withdrawn?
  15. Stock market
    money_1 Simon one day decided to invest € 48000 to the stock market. After six months he invested July 11 stock markets fell by 43%. Fortunately for Simon from July 11 5 to October 11 his shares have risen by 13%. Simon is then: ?
  16. Logic
    blue-barrel A man drinks a barrel of water for 31 days, woman for 58 days, for how many days they drink barrel together?
  17. Cow
    krava_1 193 cow consumes 13510 kg hay per day. How many kg of hay consume one cow in one day?
  18. Right Δ
    ruler Right triangle has length of one leg 7 cm and length of the hypotenuse 25 cm. Calculate the height of the triangle.
  19. 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?
  20. Apples
    apples Hanka has 8 apples more than Juro and 6 apples less than Mirka. Mirka has 21 apples. How many apples has Hanka and how many Juro?

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