Latest word problems

Number of problems found: 767

  • Two-element combinations
    combinatorics Write all two-element combinations from elements a, b, c, d.
  • Fresh juice
    flasa The seller offers fresh-squeezed juice, which the customer either pours into his own containers or sells it in liter plastic bottles, which the customer buys from him. A liter of juice costs 40 CZK more than a bottle. There is no charge for turning the ju
  • Nautical miles
    mapa How many nautical miles do they sail if the route is shown on a 1:25 000 scale map with a 7.4 cm long line?
  • Borrowing bicycle
    cukriky Jakub lent a bicycle to friends who wanted to ride it. For a three-hour bike ride, Jakub received 2 chocolates. Yup. If you wanted a bike for 2 hours, you had to give Jakub 12 candies. Peter gave Jakub 1 chocolate and 3 candies. How long can Peter ride Ja
  • The temperature 9
    teplomer_1 The temperature at 9 a. M. is 2 degrees. The temperature rises 3 more degrees by noon. Which expression describes the temperature at noon? Calculate the new temperature value.
  • Temperature rise and fall
    teplomer_2 On Friday, the temperature was 82°F. The temperature changed by –2°F on Saturday, and then it changed by 5°F on Sunday. What was the temperature on Sunday? How did the temperature change?
  • Ladder
    rebrik How long is a ladder that touches on a wall 4 meters high and its lower part is 3 meters away from the wall?
  • Celsius 2
    teplomer_1 5 degrees Celsius at midday dropped 12°Celsius degree by evening. What is the temperature?
  • Quadrilateral pyramid
    jehlan_4b_obdelnik Find the height and surface of a regular quadrilateral pyramid with a base edge a = 8cm and a wall height w = 10cm. Sketch a picture.
  • Triangular pyramid
    jehlan3_1 Calculate the volume of a regular triangular pyramid with edge length a = 12cm and pyramid height v = 20cm.
  • Statistical XY file
    trendline Year; money spent on advertising; profit (three values each row) 2008 2 12 2009 5 20 2010 7 25 2011 11 26 2012 15 40 1. draw a scatter diagram depicting the data. 2. calculate the Pearson's correlation coefficient. 3. determine the linear regression equat
  • Soccer teams
    lopticky Have to organize soccer teams. There are 3 age groups. How many different ways can you organize teams of ten for each age group? Is this a permutation or combination?
  • Place vector
    vectors Place the vector AB, if A (3, -1), B (5,3) in the point C (1,3) so that AB = CO
  • Insert 4
    arithmet_seq_1 Insert 3 arithmetic means between 3 and 63.
  • Harmonic oscillator
    kmity Calculate the total energy of a body performing a harmonic oscillating motion if its mass is 200 g, the amplitude of the deflection is 2 cm and the frequency is 5 Hz. Round the result to 3 decimal places.
  • Space diagonal angles
    kvadr_diagonal Calculate the angle between the body diagonal and the side edge c of the block with dimensions: a = 28cm, b = 45cm and c = 73cm. Then, find the angle between the body diagonal and the plane of the base ABCD.
  • Ascend vs. descent
    lines Which function is growing? a) y = 2-x b) y = 20 c) y = (x + 2). (-5) d) y = x-2
  • Marketing
    statistics Year; money spent on advertising; profit 2008 2 12 2009 5 20 2010 7 25 2011 11 26 2012 15 40 1. draw a scatter diagram depicting the data. 2. calculate the Pearson's correlation coefficient. 3. determine the linear regression equation.
  • Insert 3
    arithmet_seq Insert five arithmetic progression members between -7 and 3/2.
  • Insert AP member
    mean_normal Insert arithmetic means between 75 and 180.

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