Advertisement
Help Keep Boards Alive. Support us by going ad free today. See here: https://subscriptions.boards.ie/.
https://www.boards.ie/group/1878-subscribers-forum

Private Group for paid up members of Boards.ie. Join the club.
Hi all, please see this major site announcement: https://www.boards.ie/discussion/2058427594/boards-ie-2026

Try solving this!

124

Comments

  • Registered Users, Registered Users 2 Posts: 1,479 ✭✭✭Notorious97


    This thread is what i imagine cabinet budget meetings to go like


  • Closed Accounts Posts: 2,865 ✭✭✭Mrs Garth Brooks


    Cut the cheese with a cheesecutter?


  • Registered Users, Registered Users 2 Posts: 634 ✭✭✭zoe 3619


    Mr. G wrote: »
    To the power of 2, so Metres Squared. SI units for area in other words

    20 metres squared? Of cheese? Maybe not reading this right...


  • Registered Users, Registered Users 2 Posts: 22,655 ✭✭✭✭Tokyo


    here ya go.... :D


  • Registered Users, Registered Users 2 Posts: 2,098 ✭✭✭kiffer


    Um... the OP has made a slight mistake if he is trying to ask the same question as the one off the telly...

    there are 3 wheels of cheese, of equal thickness.
    the first has a diameter of 12 cm
    the second a diameter of 16 cm
    and the last one a diameter of 20 cm

    Cut the three cheeses up in as few cuts as possible so that there are 4 equal portions of cheese.


  • Advertisement
  • Registered Users, Registered Users 2 Posts: 1,794 ✭✭✭Aongus Von Bismarck


    mike_ie wrote: »
    here ya go.... :D

    That's the answer I would have given. Although in the OP he gives the size of the cheese as m^2 which means they are 2D circles (magic cheese) and therefore not cylinders like you would assume.


  • Registered Users, Registered Users 2 Posts: 2,098 ✭✭✭kiffer


    mike_ie wrote: »
    here ya go.... :D

    That's 6 cuts...


  • Registered Users, Registered Users 2 Posts: 22,655 ✭✭✭✭Tokyo


    kiffer wrote: »
    That's 6 cuts...

    Not if the cheese wheels are lined up as in the diagram. One cut across through the three, one cut down through the three....


  • Registered Users, Registered Users 2 Posts: 2,098 ✭✭✭kiffer


    mike_ie wrote: »
    Not if the cheese wheels are lined up as in the diagram. One cut across through the three, one cut down through the three....

    No, it's six cuts.
    Sorry them's the rules.


  • Registered Users, Registered Users 2 Posts: 2,098 ✭✭✭kiffer


    All you have are the cheeses and a knife.
    Each cut is considered separately even if you stack them or cut them all at the same time.


  • Advertisement
  • Registered Users, Registered Users 2 Posts: 25,420 ✭✭✭✭sligojoek


    Take the 16^2 cheese.

    We need 4m^2 which is 1/4. It's going to take two cuts alone to do that. We've no cuts left for the biggest piece.


  • Registered Users, Registered Users 2 Posts: 16,250 ✭✭✭✭Iwasfrozen


    Cut 4 from the 16 and 8 from the 20, everyone gets 12. Probably been solved by now anyway.


  • Closed Accounts Posts: 768 ✭✭✭PinkLemonade


    kiffer wrote: »
    Um... the OP has made a slight mistake if he is trying to ask the same question as the one off the telly...

    there are 3 wheels of cheese, of equal thickness.
    the first has a diameter of 12 cm
    the second a diameter of 16 cm
    and the last one a diameter of 20 cm

    Cut the three cheeses up in as few cuts as possible so that there are 4 equal portions of cheese.

    Does the solution have to include the angles of the cuts? Or just the resultant proportions?


  • Registered Users, Registered Users 2 Posts: 25,420 ✭✭✭✭sligojoek


    Put the whole lot in a grater, weigh it and divide by 4


  • Registered Users, Registered Users 2 Posts: 2,098 ✭✭✭kiffer


    Does the solution have to include the angles of the cuts? Or just the resultant proportions?

    The cuts are important but you don't need to show the angles... you don't have a compass.
    The (correct) sizes are important.

    The cuts don't have to be straight lines.


  • Closed Accounts Posts: 768 ✭✭✭PinkLemonade


    kiffer wrote: »
    The cuts are important but you don't need to show the angles... you don't have a compass.
    The (correct) sizes are important.

    The cuts don't have to be straight lines.

    And it's just the volume of the portions that matter, not the shape?


  • Registered Users, Registered Users 2 Posts: 26,578 ✭✭✭✭Turtwig


    And it's just the volume of the portions that matter, not the shape?

    If the thickness is equal you can neglect volume entirely and focus on area. Assume they're infinitely thin slices of cheese.


  • Registered Users, Registered Users 2 Posts: 1,456 ✭✭✭bogwalrus


    Since they are circular you can do a circular cut that will only count as one cut. So in saying this I would cut out the right square meter in order to have 4x equal sections. I think this could be done in 2 circular cuts.


  • Closed Accounts Posts: 768 ✭✭✭PinkLemonade


    Jernal wrote: »
    If the thickness is equal you can neglect volume entirely and focus on area. Assume they're infinitely thin slices of cheese.

    Grand got it much earlier but the question was so badly asked I wasnt sure


  • Posts: 951 ✭✭✭ [Deleted User]




  • Advertisement
  • Closed Accounts Posts: 6,720 ✭✭✭Sir Arthur Daley


    What is the answer? :o


  • Registered Users, Registered Users 2 Posts: 1,050 ✭✭✭JIdontknow


    Answer is the OP has obviously eaten too much cheese and confused, Must be strong cheese Like the Specsavers add, what kind of cheese was that??


  • Registered Users, Registered Users 2 Posts: 847 ✭✭✭Bog Standard User


    dotsman wrote: »

    If it's 3 blocks to be cut into 4 even allotments in 2 cuts -also simple:
    Cut 4 off the 16 block
    Cut 8 off the 20 block and pile it with the 4.
    You now have 4 piles of 12.

    actually you have 5 pieces 3x 12 1x 8 and 1x 4 so wrong answer


  • Registered Users, Registered Users 2 Posts: 14,489 ✭✭✭✭SteelyDanJalapeno


    actually you have 5 pieces 3x 12 1x 8 and 1x 4 so wrong answer

    parts can be combined.........


  • Banned (with Prison Access) Posts: 272 ✭✭asteroth


    Mr. G wrote: »
    Ok, I saw this on TV a few days ago and thought I would ask you guys if you can figure it out. I know the answer by the way.

    You have 3 circular blocks of cheese. One 12m^2, another 16m^2 and the final one 20m^2. You cannot stack them on top of each other. How can you divide them equally into 4 with none left over? It can be done in two cuts.

    It's clever too!

    Since when was volume measured in units of area?


  • Registered Users, Registered Users 2 Posts: 397 ✭✭whitewave


    This thread had so much potential with 2 of my favourite things: cheese and puzzles.

    Instead, I am confused, upset and hungry. Devoid of the answer actual question, and cheese.


  • Closed Accounts Posts: 3,642 ✭✭✭MRnotlob606


    Im sorry matilda i swear that was my pineapple


  • Banned (with Prison Access) Posts: 272 ✭✭asteroth


    Mr. G wrote: »
    Your pretty ****ed if you eat it I suppose.

    Sorry, it was actually 20 not 24, and you have to divide it into 4.

    You can only cut it twice and it's not side by side.

    Just cut 8 sqm from the 20 and 4 from the 16 and put them together, then you got 4 x 12 pieces.


  • Closed Accounts Posts: 2,743 ✭✭✭blatantrereg


    Easy. Cut 4 square metres from the 16 and 8 from the 20. Then you have 4+8, 12, 12 and 12 amounts. Hopefull in >100 replies someone has already copped this but I didn't check.


  • Advertisement
  • Banned (with Prison Access) Posts: 272 ✭✭asteroth


    jimboblep wrote: »
    total area is 800 m2
    so divide largest block in 2 giving 2 200m2 blocks
    cut 56m2 off second largest block add tht to smallest block making another 200m2
    and leaving 200m2 on the middle block

    How the hell does 12 + 16 + 20 = 800 ?


Advertisement
Advertisement