Jump to content
British Coin Forum - Predecimal.com

50 Years of RotographicCoinpublications.com A Rotographic Imprint. Price guide reference book publishers since 1959. Lots of books on coins, banknotes and medals. Please visit and like Coin Publications on Facebook for offers and updates.

Coin Publications on Facebook

   Rotographic    

The current range of books. Click the image above to see them on Amazon (printed and Kindle format). More info on coinpublications.com

predecimal.comPredecimal.com. One of the most popular websites on British pre-decimal coins, with hundreds of coins for sale, advice for beginners and interesting information.

Leaderboard

  1. blakeyboy

    blakeyboy

    Accomplished Collector

    • Points

      4

    • Content Count

      1,850

  2. Sword

    Sword

    Accomplished Collector

    • Points

      2

    • Content Count

      2,327

  3. Rob

    Rob

    Expert Grader

    • Points

      1

    • Content Count

      12,596

  4. Paddy

    Paddy

    Accomplished Collector

    • Points

      1

    • Content Count

      1,884

Popular Content

Showing content with the highest reputation on 04/03/2020 in all areas

  1. 3 points
    blakeyboy
    The solutions on Wiki are under 'Recreational Mathematics'. I glanced at them and had to go and lie down.
  2. 1 point
    blakeyboy
    I remember the South African Police being asked about integration in the late 1970's, in those dark racist days there. The Police Chief said there was nothing to worry about, since: "our boys are up all night integrating suspects"... Must get a snack - all this talking has given me quite an apartheid.....
  3. 1 point
    Paddy
    I like the fact that the sixpence is "defiantly silver", which the George IV crown certainly isn't!
  4. 1 point
    Rob
    I was doing something similar by trying to add two segments with similar chord length but differing radii. It all went t*ts up when it dawned that I had a second variable (the angle) in the equations - at which point I realised I had forgotten about integrals.
  5. 1 point
    Sword
    I was thinking of doing it by a different way. The area of sector + the areas of the 2 segments. Rather curious if we can still remember the A level maths done decades ago. But on second thought, I would rather make some lunch instead.
  6. 1 point
    Sword
    I started with the queen at a corner if that's allowed.
  7. 0 points
    Paddy
    With no one volunteering a solution I decided to see if the answer was online anywhere - and it is. Here is a comprehensive solution on wikipedia along with several further problems and solutions on the same theme: https://en.wikipedia.org/wiki/Goat_problem I didn't know it was quite THAT complicated!





×