Product Description

The international best-seller that makes mathematics a thrilling exploration.

In twelve dreams, Robert, a boy who hates math, meets a Number Devil, who leads him to discover the amazing world of numbers: infinite numbers, prime numbers, Fibonacci numbers, numbers that magically appear in triangles, and numbers that expand without . As we dream with him, we are taken further and further into mathematical theory, where ideas eventually take flight, until everyone-from those who fumble over fractions to those who solve complex equations in their heads-winds up marveling at what numbers can do.

Hans Magnus Enzensberger is a true polymath, the kind of superb intellectual who loves thinking and marshals all of his charm and wit to share his passions with the world. In The Number Devil, he brings together the surreal logic of Alice in Wonderland and the existential geometry of Flatland with the kind of math everyone would love, if only they had a number devil to teach it to them.

Product Details

• Amazon Sales Rank: #21362 in Books
• Published on: 2000-05-01
• Original language: English
• Number of items: 1
• Binding: Paperback
• 264 pages

Features

• ISBN13: 9780805062991
• Condition: NEW
• Notes: Brand New from Publisher. No Remainder Mark.
• Click here to view our Condition Guide and Shipping Prices

Amazon.com Review
Young Robert's dreams have taken a decided turn for the weird. Instead of falling down holes and such, he's visiting a bizarre magical land of number tricks with the number devil as his host. Starting at one and adding zero and all the rest of the numbers, Robert and the number devil use giant furry calculators, piles of coconuts, and endlessly scrolling paper to introduce basic concepts of numeracy, from interesting number sequences to exponents to matrices. Author Hans Magnus Enzensberger's dry humor and sense of wonder will keep you and your kids entranced while you learn (shhh!) mathematical principles. Who could resist the little red guy who calls prime numbers "prima donnas," irrational numbers "unreasonable," and roots "rutabagas"? Not that the number devil is without his devilish qualities. He loses his temper when Robert looks for the easy way out of a number puzzle or dismisses math as boring and useless. "What do you expect?" he asks. "I'm the number devil, not Santa Claus." (Ages 10 to adult) --Therese Littleton

From Publishers Weekly
In a starred review, PW noted that "exceptionally handsome four-color illustrations and vignettes deepen the magic of this mathematically minded fantasy. For certain kinds of readersAchess players, puzzle enthusiastsAthis will be a favorite." Ages 11-up. (May)
Copyright 2000 Reed Business Information, Inc.

From School Library Journal
Grade 6 Up-This book consists of a dozen unusual dreams of Robert, a 12 year old who thinks math is "a waste of time." The number devil who visits him each night changes that with magical demonstrations of mathematical concepts that intrigue the boy. Starting simply with the concept of infinity, the devil introduces prime numbers, square roots, Fibonacci numbers, and more, inventively using coconuts, multiplying rabbits, and other oddities as examples. He demonstrates concepts in imaginative ways that actually make sense, focusing on general principles, with an emphasis on the pleasing consistency of mathematics. Robert becomes interested and is named a "number apprentice" in the final chapter. Building new concepts from those previously learned makes the progression to more complicated areas easier and satisfying. The devil uses made-up terms (e.g., square roots are called "rutabagas") and the author warns that students should learn the correct words. A helpful index identifies these terms, and also reveals the identities of various mathematicians referred to by other names (Johan van de Lune is the "Man in the Moon"). Colorful, cartoon illustrations appear throughout, along with useful tables and diagrams. The dream world recalls Alice's Adventures in Wonderland and Norton Juster's The Phantom Tollbooth (Knopf, 1961), but the attempts at humor and silliness here never match the wit and charm of those classics. Although it is not a fully realized fantasy, The Number Devil may intrigue and teach readers willing to try an unusual introduction to math principles.
Steven Engelfried, West Linn Public Library, OR
Copyright 1998 Reed Business Information, Inc.

Customer Reviews

This is a great book! :o)
I read this book for the first time not quite a year ago, and I loved it! Now I'm 13, and just recently lent the book to my gr. 8 math teacher-who thought it was amazing. This is a cute approach to challenging math topics. Now I'm doing a book report on The Number Devil and just want to say that this book is not only a wonderful novel with well developped characters, but a wonderful teaching tool and learning book. A fantastic mix between a text book and a novel with some humour thrown in. I love it!

A Fun Mathematical Journey
In a children's book reminiscent of The Phantom Tollbooth, the reader is taken along on a magical journey of mathematical discovery. Robert is a twelve-year-old boy who detests math, mainly because his math teacher, Mr. Bockel, is incredibly boring. To the rescue comes the Number Devil, a creature who visits Robert in a series of twelve dreams. During each dream the Number Devil explains different mathematical mysteries and reveals the beauty and simplicity of numbers. In the end, both Robert and the reader gain a new appreciation for math.

Easy read, but good book....
Crossing the story Alice in Wonderland with a small, red, fiery-tempered devil with a passion for numbers gives you The Number Devil, a perfect tale with funny and curious characters.

Robert hates math, and he gets irritated because his math teacher doesn't allow calculators in class. In addition to that, he has peculiar dreams all the time. Then, one night, completely out of the blue, he dreams about a Number Devil, who takes him away to a fantastic world of numbers. Robert learns all about different mathematical ideas and concepts in a fun way. Over the course of 12 different nights, Robert learns about simple math ideas like factorials, fractions, the importance of zero, and the idea of infinity. But Robert's adventures don't stop there; Robert also learns about more complex things like triangle numbers, Fibonacci numbers, imaginary numbers, and irrational numbers. The Number Devil makes up funny terms in order to explain these to Robert. Square roots are called "rutabagas," prime numbers are "prima donnas," squaring becomes "number hopping," the Fibonacci sequence is called "the Bonacci numbers, " and factorials are named "vrooms."

Did you know that you can take any even number larger than two and find two prime numbers that add up to it? The Number Devil presents different mathematical ideas to Robert, using funny things like furry calculators and coconuts. Even Robert uses what he learns in his dreams in class. For example, the Number Devil uses coconuts to show Robert what triangular numbers are. He uses the coconuts to make triangles on the ground, and he comes up with the first ten triangular numbers: 1, 3, 6, 10, 15, 21, 28, 36, 45, and 55. Next, he comes up with a little rule for triangular numbers: Any number greater than 1 can be the sum of two or three triangle numbers. Try 83, for example. It is the sum of 10 + 28 + 45.

Not only does the Number Devil show Robert different math principles, but he takes him to Number Paradise, and there Robert meets different mathematicians like Carl Friedrich Gauss (of course, the Number Devil makes up names for the mathematicians as well, so Gauss is called Professor Horrors), Georg Cantor (Professor Singer), and Leonhard Euler (Owl). Robert also meets Felix Klein (Dr. Happy Little), and he sees the famous `Klein Bottle' (the Little Bottle). The Number Devil shows how one can't tell the inside of this object from the outside!

I thought this book was very enjoyable and funny. The illustrations were amusing and the characters were hilarious. I especially liked the Number Devil himself. I would give the book an eight out of ten only because some of the concepts described were very elementary, and it became boring for me at times. Overall, I didn't learn a lot, but the little tidbits of information and the more complex ideas were interesting. I would recommend this book for all ages as a good read aloud or for a bedtime reading book. Happy reading!