Arithmetic - examples

  1. 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?
  2. Evaluate expression
    mixed_fractions.JPG Evaluate expression using BODMAS rule: 1 1/4+1 1/5÷3/5-5/8
  3. Cube and sphere
    gule_1 Cube with the surface area 150 cm2 is described sphere. What is sphere surface?
  4. Divisibility
    divisibility Is the number 214743 divisible by 10?
  5. Chocolate
    cokolada Frank bought 6 same chocolates for 12 Eur. How many euros he pay for 19 chocolates?
  6. One half
    one_half One half of ? is: ?
  7. Family
    bigfamily The parents had 2 daughters. Each of them had one brother. How many members family had?
  8. Brick
    brick One brick is 2 kg and half a brick heavy. What is the weight of one brick?
  9. Orchard
    orchard 5 trees in 3 lines grows in the orchard. How many trees are in the orchard?
  10. Cyclist
    cyclist_2 A cyclist passes 88 km in 4 hours. How many kilometers he pass in 8 hours?
  11. Balls
    balls I have 12 balls and my friend has 18. About how many has my friend more balls?
  12. Compare
    fraction Compare fractions ?. Which fraction of the lower?
  13. Is right?
    rtriangle Is triangle with sides 24, 51 and 45 right triangle?
  14. Compare
    compare Compare with characters >, <, =: 63.79 ? 63.79
  15. Holidays
    holidays Calculate how many hours take holidays, if take 1 weeks.
  16. 7 heroes
    7statocnych 5 heroes galloping on 5 horses behind. How many ways can sort them behind?
  17. Root
    root_quadrat The root of the equation ? is: ?
  18. Reverse Pythagorean theorem
    pytagors Given are lengths of the sides of the triangles. Decide which one is rectangular: Δ ABC: 73 m, 66 m, 51 m ? Δ DEF: 63 cm, 105 cm, 84 cm ? Δ GHI: 50 dm, 48 dm, 14 dm ? Δ JKL: 31 m, 45 m, 40 m ? Δ MNO: 28 m, 53 m, 45 m ?
  19. Vans
    shuttlevan In how many ways can 7 shuttle vans line up at the airport?
  20. Weeks
    calendar 55 weeks is equal to how many days?

Do you have interesting mathematical example that you can't solve it? Enter it and we can try to solve it.



To this e-mail address we will reply solution; solved examples are also published here. Please enter e-mail correctly and check whether you don't have a full mailbox.