Contributed by Benne de Weger, the Netherlands. “The title may be translated as The Counting Devil, or maybe The Number Devil, and it has a subtitle that. Der Zahlenteufel. by Hans Magnus Enzensberger at – ISBN – ISBN – DTV Deutscher Taschenbuch – : Der Zahlenteufel () by Hans Magnus Enzensberger and a great selection of similar New, Used and Collectible Books available.

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Together they explore a variety of mathematical things a lot of them from number theory, such as prime numbers, Fibonacci numbers and the golden section, permutations, etc.

The list of historical figures in the back of the book is a great reference and a nice segue into a unit plan for integrating writing and reading into a math classroom. I can’t wait to create lessons that zahlenteutel this book.

Contributed by Anonymous The Number Devil was a rer book. This is just one work of mathematical fiction from the list. I have recommended this to many of my homeschool friends.

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Some of the math concepts zzahlenteufel a little confusing but managable. It was one of the first books I read that helped me realize how simple and beautiful Math is!

On the third night, the Number Devil brings Robert to a cave and reveals how prima-donna numbers prime numbers can only be divided by themselves and one without a remainder. Though I found the math, explanations and diagrams mathematically xer, I did not find the definition of irrational numbers sound. He also experiences recurring dreams —including falling down an endless slide or being eaten by a giant fish—but is interrupted from this sleep habit one night by a small devil creature who introduces himself as the Number Devil.

On the sixth night, the Number Devil teaches Robert about the natural occurrence of Fibonacci numberswhich the Number Devil shortens to Bonacci numbersby counting brown and white rabbits as they reproduce multiple times.


Robert finds himself at the North Polewhere the Number Devil introduces irrational numbers unreasonable numbersas well as aspects of Euclidean geometrysuch as vertices dots and edges lines. Archived from the original on 26 April The next night, the Number Devil emerges in a forest of trees shaped like “ones” and explains the necessity of the number zeronegative numbersand introduces hoppinga fictional term to describe exponentiation.

Its colorful use of fictional mathematical terms and its creative descriptions of concepts have made it a suggested book for both children and adults troubled with math. Looking back on it now, I think this book was one of the main reasons i took such a liking to math. My largest concern, like many other critics, is zzahlenteufel author’s renaming of terms. I had zahhlenteufel imagined what had awaited me! However, I have to say that the number devil is a little on the sarcastic side which, if he was a real person, would turn off a mathophobic middle-schooler.

Contributed by Rosy This book is a wonderfully funny way to talk about math. Enzenberger does a marvelous job of making seemingly difficult number theory concepts fun and easy to understand. My mother raised me with a love of numbers and math and its mysteries and complexities from an early age.

We start off with the students finding out about the pattern with the multiplication of ones 1×1, 11×11, x, etc. Buy this work of mathematical fiction and read reviews at amazon. Contributed by Katie This is a really fun way for kids, well anyone really, to read about math. Contributed by Kathryn I really loved this book, and as a future math educator, I found it to be very useful for something I could one day use in the classroom.

On the eighth night, Robert is brought to his classroom at school. Few books are written that convey the wonder of numbers. By using this site, you agree to the Terms of Use and Privacy Policy.


In chapter 10, are not all the quotients of the neighboring terms of the Fibonnaci Series rational? Did they think that a devil would scare Italian children, or that it would enrage the Catholic Church? Robert is a young boy who suffers from mathematical anxiety due to his boredom in school. By this dream, Robert’s mother has noticed a visible change in Robert’s mathematical interest, and Robert begins going to sleep earlier to encounter the Number Devil.

On the first night, the Number Devil appears to Robert in an oversized world and introduces the number one. His mother is Mrs. I did really like the way the concepts were presented and thought it was a great way to get kids interested in math. Math contests require this knowledge and here is a fun way to present it.

MathFiction: The Number Devil (Der Zahlenteufel) (Hans Magnus Enzensberger)

Not all reviews were positive, however. It’s a great book because it is easy to read and gets kids to think about mathematical ideas. The find it humorous, and imaginative, as they discover the world beyond the math book.

Contributed by John C. Retrieved 23 October In the index of the book, “unreasonable numbers” are translated as irrational. Enzensberger fostered a passion for mathematics and numbers, although he was not a mathematician by trade. It’s an excellent book!! A Mathematical Adventurebased on the book.

Hans Magnus Enzensberger

I fear I’m missing something, here! To this day i remember little things from this book, about the golden ratio and the many ways it appears in nature, the prime numbers, etc. Retrieved 17 December