Product Description
Can you insert all 10 pennies into the square opening of the puzzle?
Looks easy, but maybe not….
Great fun in a brain teaser that may take you 2 minutes or 2 days.

Circle packing puzzles are a branch of recreational mathematics where the aim is to pack n unit circles into the smallest possible square. As I thought about it , it occurred to me that this may make a fun puzzle to do with pennies.

The 10 circle problem appeared to be the best challenge as the solution is not at all obvious. I precision cut the opening such that the pennies will just fit in with no room to spare. The text is all deeply laser engraved and the backing is heavy duty floorboard so the puzzle has a great weight and feel. The puzzle comes unsolved as there is a temporary home for the tenth penny which you must find a way to insert into the large opening.

Size: 4" x 4" x .3"

Thank you for your delivery. It was fast, the clutch is very nice and i will come back for more shopping.    Review by Villana

Definitely the best website to shop on during this pandemic. Very easy to shop online and get your items quickly    Review by Lerian

Exceptional durability    Review by Benoît

I really love the item so much!    Review by Charlemagne

Love shopping at this website . These items are so updated. Short delivery times. love it.    Review by KoK

My order came over a week after it’s expected arrival date.    Review by JMR

Everything went well. But it is a shame that all info concerning the selling shop has disappeared.    Review by Fred

Great service, quality of my purchase on the scale from 1-10 is simply a 10+, thank you    Review by Popcorn006

Premium materials    Review by Charles

Super fast shipping, great boxing and easy to order. Definitely keep ordering from here.    Review by Melanie

My experience has been amazing. The selection, the prices and most of all the service!    Review by bukk

The selection is abundant and I can buy some brands that are not sold in US.    Review by Laurie

Love shopping with here as it offers better price than other online shops, tax free.    Review by Hovaguimian

dependable as always ..quick delivery.    Review by Dine

Outstanding effort!    Review by Bono14

the service was awesome and the delivery was timely. I couldn't believe how fast I received my order!    Review by carla

Couldn't have been better - shopping here is always seamless, speedy and stress-free.    Review by napoleon