Download a FREE Solution for your puzzles!

Vanishing Line
Click Image to Enlarge

Write Review Write your own review!

Vanishing Line

$16.99 CAD Canadian Flag

Your Credit Card company or PayPal will automatically convert* the Canadian Dollar amount into your local currency.

Currency Converter: * Exchange rates shown above are estimates only, and may vary slightly from the rates charged by PayPal or your Credit Card Company.

Product Information

ObjectCount the lines - are there 12 or 13?
DifficultyLevel 7 - Challenging
BrandCreative Crafthouse
TypesDave Janelle, Other Wood Puzzles
Dimensions7.7 cm x 17.3 cm x 1.3 cm / 3 in x 6.8 in x 0.5 in
PackagingShrink Wrap

Product Description

Look at the 2 pieces of wood and you will clearly see 13 horizontal lines.

Yet flip the frame upside down and there are only 12 lines!  How can this be?
Some call this the "Sobriety Test", yet there is an interesting math basis for the puzzle.
The idea for this wonderful illusion came from one of Martin Gardner's recreational math books.  Good for messing with friends, or a coffee table/bar type item, or effective in the math classroom also.
Pieces are made from 1/4" thick hardwood, either maple or cherry.  Base is made from floorboard material so it is very strong.
Size of the puzzle in base is 7" x 3.25" x 0.6"

Customer Reviews |

Write your own review!

This item has yet to be rated

Write your own review


Please enter the characters you see above:

* If you're vision impaired or are using a browser that doesn't display images, please email your review to instead of using this form.

Your review will be approved by the site admins (to filter inappropriate matter and spam) before appearing on the site.
Please only post your message once, it will be received and processed in a timely manner. We make every attempt to post all legitimate reviews submitted, positive or negative. To help ensure your review appears please make it relevant to the product shown above and keep your words family friendly. If you provide an email address (above) you will be notified when your review is processed. Your email address will not be used for any other purpose and you will not be added to any mailing lists. Thank you for sharing your opinions with us and others!