Hide this

Results from Google Books

Click on a thumbnail to go to Google Books.

The Cat in Numberland by Ivar Ekeland

The Cat in Numberland

by Ivar Ekeland

MembersReviewsPopularityAverage ratingConversations
263415,071 (3.5)None



Sign up for LibraryThing to find out whether you'll like this book.

No current Talk conversations about this book.

Showing 3 of 3
Perplexed cat. Hotel Infinity. What wasn't to like?
Let Z stay up late and skip a shower to finish this one. ( )
  beckydj | Mar 31, 2013 |
This is a cute book with well-drawn illustrations. Its mission is to impart a mathematical understanding of infinity to young people and it is down in a rather clever fashion. The big task is how to fit Zero in a room when Hotel Infinity's rooms are all "filled up." ( )
  vpfluke | Apr 10, 2010 |
With thin pencil lines, in black and white cartoon fashion, O’Brien creates an imaginary world where numbers live in the Hotel Infinity, run by Mr. & Mrs. Hilbert and their white cat (who mostly sleeps peacefully curled up by the fireplace), where there is a room number 1 but no last room. The numbers know four games: addition, subtraction, multiplication and division. The only game they don’t like is division because not all of them can play. The story covers the inclusion of letters standing in for numbers (like math problems), fractions, and its all done in fun cartoonesque fashion, that even if the cat can’t figure it out and has to move to Corsica (where the Hotel has only 20 rooms, so no numbers or letters can visit) the 9-12 reader will.
If You Liked This, Try: Cookies: Bite-Size Life Lessons by Amy Krouse Rosenthal, Sea Horse: The Shyest Fish in the Sea by Chris Butterworth, Zelda and Ivy: The Runaways by Laura McGee Kvasnosky, Robert and the Practical Jokes by Barbara Seuling, Invisible by Katia Kamm. ( )
  avcr | Dec 15, 2007 |
Showing 3 of 3
no reviews | add a review
You must log in to edit Common Knowledge data.
For more help see the Common Knowledge help page.
Series (with order)
Canonical title
Original title
Alternative titles
Original publication date
Important places
Important events
Related movies
Awards and honors
First words
Last words
Disambiguation notice
Publisher's editors
Publisher series
Original language

References to this work on external resources.

Wikipedia in English


Book description
Haiku summary

Amazon.com Product Description (ISBN 081262744X, Hardcover)

At Mr. and Mrs. Hilbert’s Hotel Infinity, the resident cat is puzzled. The hotel is fully booked — the rooms are full of Numbers, both Odds and Evens — yet guests continue to arrive. When Zero shows up, there’s a massive room switching, and he stays, even though Mr. Hilbert insists he’s not really a Number. Then the Letters appear and everyone still has a room, even though no Numbers have left. No matter how many guests arrive or depart, the hotel accommodates them all, and is always full. But when the Fractions arrive, demanding rooms, real chaos threatens. Can an ingenious solution be found to house them all?

Based on mathematician David Hilbert’s famous paradox of the Grand Hotel, The Cat in Numberland offers a refreshingly clear explanation of infinity for readers of all ages. John O’Brien’s imaginative line drawings further elucidate the complex concept, as well as simple functions like addition, subtraction, division, and multiplication.

(retrieved from Amazon Thu, 12 Mar 2015 18:18:17 -0400)

Readers learn about the concept of infinity through the guests checking into the Hotel Infinity.

Quick Links

Swap Ebooks Audio
41 wanted

Popular covers


Average: (3.5)
2 1
3 1
4 2
4.5 1

Is this you?

Become a LibraryThing Author.


You are using the new servers! | About | Privacy/Terms | Help/FAQs | Blog | Store | APIs | TinyCat | Legacy Libraries | Early Reviewers | Common Knowledge | 116,958,188 books! | Top bar: Always visible