Examples for 9th grade - page 4

  1. Sequence
    arithmetic_seq In the arithmetic sequence is a1=-9, d=4. Which member is equal to the number 147?
  2. Square diagonal
    square_diagonal Calculate the length of diagonal of the square with side a = 23 cm.
  3. Bonus
    moeny Gross wage was 1113 USD including 16% bonus. How many USD were bonuses?
  4. Transforming cuboid
    cube Cuboid with dimensions 12 cm, 20 and 8 cm is converted into a cube with the same volume. What is its edge length?
  5. Invitations
    envelope For every 5 minutes writes Dana 10 invitations, while Anna 14 invitations. How long will write together 120 invitations?
  6. OK circle
    circles2 Calculate the radius (circumradius) of the circle described right triangle with hypotenuse long 8 and one cathetus long 4.
  7. Permill
    permille How many permill is 1931 from 166456?
  8. Pool
    swimming-pool The swimming pool is 6 m wide and 14 m long and 185 cm deep. How many hectoliters of water is in it, if the water is 9 cm below its upper edge.
  9. Compare II
    powers Which of the numbers 158, 815 is greater?
  10. Tunnels
    Mysky Mice had built an underground house consisting of chambers and tunnels: • each tunnel leading from the chamber to the chamber (none is blind) • from each chamber lead just three tunnels into three distinct chambers, • from each chamber mice can get to any
  11. Shooter
    terc The probability that a good shooter hits the center of the target circle I is 0.22. The probability that the target hit intercircle is II 0.41. What is the probability that it hits the target circle I or II?
  12. Madams
    womans During the spring cleaning ladies going to wash windows. Mother takes wash all the windows 5 hours, the grandmother 3 times longer and Paula wash all windows in 5 hours. How many hours will spend washing the windows this "women's team" if working togethe
  13. ABS
    sphere_nice What is the value of ? ?
  14. Teams
    football_team How many ways can divide 12 players into two teams of 6 member?
  15. Area codes
    us_codes How many 6 digit area codes are possible if the first number can't be zero?
  16. Circle chord
    circleChord What is the length d of the chord circle of diameter 58 mm, if distance from the center circle is 24 mm?
  17. Radius
    green_circle Determine the radius of the circle, if its perimeter and area is the same number.
  18. 2nd class variations
    cards From how many elements you can create 6480 variations of the second class?
  19. Angles and sides of the triangle
    trig Triangle ABC has a circumference of 26 cm. Lengths of the sides are as follows: a = 11.2 cm; b = 6.5 cm. Arrange the interior angles in order of its size. ?
  20. Gauss
    kfgauss Help little C.F. Gauss sum all the integers from 1 to 340.

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