Grade - examples - page 134

  1. Nightingale
    slavik Nightingale sang five seconds for 5 hours and 5 minutes. How many seconds were missing to sing 10 hours?
  2. Sequence
    mandlebrot Find the common ratio of the sequence -3, -1.5, -0.75, -0.375, -0.1875. Ratio write as decimal number rounded to tenth.
  3. Troops
    army If the general sorts troops into the crowd by nine left 6. How many soldiers has regiment if we know that they are less than 300?
  4. Add vector
    vectors_2 Given that P = (5, 8) and Q = (6, 9), find the component form and magnitude of vector PQ.
  5. Trickster 2
    cents Figliarko had in wallet a few cents. One friend returned 4 cents and another friedn 7 cents. Now he has 51 cents in the wallet. How many cents previously had in his wallet?
  6. Wood lumber
    hranol_7 Wooden lumber is 4 m long and has a cross section square with side 15 cm. Calculate: a) the volume of lumber b) the weight of the lumber if 1 m3 weighs 790 kg
  7. Plot
    parcela_1 The plot on which Mr. Kalous is to build a house has the shape of a rectangle. On a 1: 500 scale, its dimensions are 7cm and 5.5cm. Find out the dimensions of the plot. Calculate the parcel size.
  8. Addends
    two Number 118 divide into two addends, so first addend is 69 greater than 75% of the second addend.
  9. The shop
    lahev The shop has 3 hectoliters of water. How many liter bottles is it?
  10. Assistant
    psaci-stroj Assistant rewrote 15% of the entire manuscript in 12 hours. How many hours must still write to rewrite the rest of the manuscript?
  11. Car model
    cars_2 Car model is 52 mm long and the real car is 4524 mm long. What was the scale of model car?
  12. Lcm 2
    lcm Create the smallest possible number that is divisible by numbers 5,8,9,4,3
  13. Car parking
    motocycles The car park has 45 motorcycles and 25 cars. 14 cars went away and 2 arrived, then departs 12 motorcycles and 2 arrive. How many motorbikes and cars there are now?
  14. Gas consumption
    vessel The vessel consume 100 tons of gas in 250 miles. How many fuel will the vessel consume if it travels 400 miles?
  15. 2d shape
    semicircles_rect Calculate the content of a shape in which an arbitrary point is not more than 3 cm from the segment AB. The length of the segment AB is 5 cm.
  16. Megapascals
    engine What is the area of crosssection of the piston, if the force of 300 kN produces a pressure of 5 MPa?
  17. Potatoes
    zemiaky_3 Daniela and Michael would jointly dug potatoes for 7.5 hours. But if Daniela was working alone she would take 2.5 hours more as if he were working with Michael. Determine how much for the work done by Michael himself and how much Daniela herself.
  18. Football team
    trenyrky Football team has in store black, purple and orange shirts, blue and white shorts and striped and gray socks. How many different outfits players may start?
  19. Cube edge
    cubes_9 Determine the edges of the cube when the surface is equal to 37.5 cm square.
  20. Cinema 4
    cinema_2 In cinema are 1656 seats and in the last row are 105 seats , in each next row 3 seats less. How many are the total rows in cinema?

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