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  3. CaptainEd

    Squares on a plywood

    I question whether the information given about a figure is sufficient to uniquely determine the number of included squares:
  4. CaptainEd

    the distinguished matrix

    While this doesn’t answer the question with randomly placed 1s, I think it does give an upper bound to the number of columns that can be removed.
  5. Last week
  6. JohnnhoJ

    Wierd sqaure

    look in it is inward look out its outward Wierd Square.gdraw
  7. Earlier
  8. rocdocmac

    November Quickie II

    Excellent
  9. EventHorizon

    November Quickie II

  10. CaptainEd

    November quickie

    Much more satisfying, thank you!
  11. rocdocmac

    November quickie

  12. rocdocmac

    November Quickie II

    Can one solve this mathematically i.e. not by trial and error? In 1988 my granny was quite a bit older than my grandpa. The difference between the square of their ages was 1988. How old were they?
  13. rocdocmac

    November quickie

  14. CaptainEd

    the distinguished matrix

    Scratching the surface...
  15. Wilson

    Another Honorable Riddle

    Perhaps a ....
  16. CaptainEd

    November quickie

    Here’s one solution
  17. TimeSpaceLightForce

    Graphic Painting

  18. Thalia

    Graphic Painting

  19. TimeSpaceLightForce

    Graphic Painting

  20. TimeSpaceLightForce

    The Dollar Bill

  21. rocdocmac

    November quickie

    Replace the question marks below with the missing numbers. The connection is the same between each line of three numbers. 5 ? 575 2 3 ? ? ? 3968
  22. CaptainEd

    Circles covering a rectangle

    Oooh, sounds like you’ve nailed it, plainglazed.
  23. BMAD

    Arc length = area

    Find a function where the arc lenth and area between any two randomly defined points is the same. There are two.
  24. Shakeepuddn

    Showdown Riddle

    There!
  25. plainglazed

    Showdown Riddle

  26. plainglazed

    Circles covering a rectangle

    Spoiler fwiw
  27. TimeSpaceLightForce

    The Dollar Bill

  28. Thalia

    Graphic Painting

  29. Shakeepuddn

    Showdown Riddle

    Not it. Think big
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