Brothers Handmade L.L.C. :: Puzzles :: Revolving Century wood math puzzle

Revolving Century wood math puzzle

Revolving Century wood math puzzle

Revolving Century wood math puzzle
Can you arrange he rings such that each stack of numbers from bottom to top adds to exactly 100? This is a puzzle from the early 1900's. It is shockingly difficult to solve! I found the design in Jerry Slocum and Jack Boterman's "New Book of Puzzles". The puzzle was originally made of paper disks riveted together, but I thought it would make a great wood puzzle and it came out quite nice I think. This is a puzzle that both adults and youngsters down to middle school may enjoy. It certainly hones your ability to do addition quickly in your head! I have found 1 solution on my own and thanks to computer work done by Ken Irvine we now know this is the only possible solution! Ken also determined that there are 7776 different possible combinations that could created with the disks.
SKU SKU1780411111
Weight 1.10 lbs
Our price: $20.00

Customer feedback

Customer Reviews

  • Author: Piter W
    I bought it here, but i'm little bit angry bacause today i found it cheaper here:
  • Author: tocaaccully
    [url=]Тонировка авто в нижнем новгороде цена недорого[/url]
    [url=]loan dao phuc han Arecibo Puerto Rico[/url]
    [url=]new developments for rent in nyc[/url]
    [url=]Бесплатный журнал форекс магазин[/url]
  • Author: Ralphsib
    cialis e udito


    cialis 45 tl

  • Author: Geraldareni
    canadian drugs without prescription
    prescription drugs online without

    drugstore online
    [url=]amoxicillin side effects[/url]
    rx price comparison
    cialis savings card
  • Author: kamagra 100 mg
    kamagra jelly paypal
    kamagra oral jelly viagra
    kamagra 100mg oral jelly amazon
    [url=]kamagra customer reviews[/url]
    kamagra 100mg tablets indian
    kamagra oral jelly kaufen amazon
  • Author: Anthonylof
    no prescription pharmacy canada
    [url=]no prior prescription required pharmacy[/url]
  • Author: Anthonylof
    online pharmacies canada
    [url=]canadian pharmacies top best[/url]
  • Author: prescription without a doctor's prescription
    canadian mail order pharmacies to usa
    [url=]online pharmacy[/url]
  • Author: top 10 mail order pharmacies
    most reliable canadian pharmacies
    [url=]canadian pharmacies online[/url]
  • Author: de beste nachtcreme
    Cut to today, when there is a profusion of anti aging gyp liable to products like creams, serums, gels and powders that all holler to be this fount of youth. Some position their anti aging obeahism including ingredients that attired in b be committed to a ton of well-organized by and dissection on how peel ages to bankroll b overthrow them up and some are continent hype.