Il mago dei numeri. Un libro da leggere prima di addormentarsi, dedicato a chi ha paura della matematica
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Il mago dei numeri. Un libro da leggere prima di addormentarsi, dedicato a chi ha paura della matematica

3.87 of 5 stars 3.87  ·  rating details  ·  2,342 ratings  ·  320 reviews
Un diavoletto dai mille giochi di prestigio conduce Roberto, un ragazzino che odia la matematica perché insegnata male da un professore antipatico, alla scoperta del paese incantato dei numeri. E il mondo della matematica diventa fantasioso come una fiaba.
Paperback, 259 pages
Published January 1st 2010 by Einaudi (first published 1997)
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Kelly Maybedog
Random math thinly disguised as a novel. I get what it's trying to do but it feels more like the kind of characters that kids' textbooks have to make the info more "fun." there isn't a plot here. But if it gets kid's reading about math then go go go. Plus, the illustrations are really cute.
I love the idea of a novel that relies on and promotes interest in math, but the execution here just fell way short for me. The story itself - that a boy who hates math learns to like it through a series of dreams in which he interacts with a Number Devil - is a little thin and repetitive. But what I found bothered me the most were the explanations of the math concepts. I've seen some great nonfiction books that make math concepts interesting AND explain them in multiple ways for students who ca...more
Cheryl in CC NV
One of those fun all-ages books like Phantom Tollbooth. So far though, no social commentary etc. that make PT, Flatland, and Alice in Wonderland so amazing.

Ok done. Moved a little fast for me - so even though it's written at a level for 10-13 year-old children (I think) I had to struggle a bit. If I were a child, I'd have taken the time to work through all the problems and create more related examples, etc. In fact, when I was a child, I loved books like this and would have totally loved this 5...more
Lance Greenfield
This book makes maths fun, even for those little people who believe it to be a laborious trudge through treacle. In fact, that would describe Robert, the main character in this book. He has been struggling with maths for as long as he can remember. One night, he dreams that he meets a little devil, The Number Devil, who teaches him, as he sleeps, all sorts of useful tricks with numbers.

When you enjoy something, and gain immediate benefit, you obviously learn more.

My Dad made all aspects of mathe...more
Imagine that a math teacher wanted to write a children's book to show kids how cool math really was; but since it's a math teacher and not an English teacher doing the writing, all you end up with are math concepts written out in analogies similar to what you'd hear in a math classroom -- that's what this book is like. The story is about a boy named Robert who hates his math class and math teacher and by extension math in general. He falls asleep and over a series of twelve different dreams over...more
"كان روبرت يعلم انه ليس من الممكن أن يشرح الانسان كل شيء لوالدته"
وهكذا أوصيت امي بقراءة الكتاب:)

الكتاب جدا لطيف ولكم تمنيت ان يكون هناك مثيل له بمعلومات ذات مستوى أعلى
Jason Hamilton
This book is a thinly veiled novelization of a few math problems. It's wrapped in a story about a boy with crazy dreams that begins dreaming about math and learning things from a number devil.

My impression was that the book got the formula all wrong. The story is nonsensical and tedious, so you're ready to get to the math. The math is then explained via conversation between the main character and the number devil, so you really have to reflect on the topics after each chapter to understand them....more
Anne Hamilton
...But as he stood in front of his mirror in his pajamas, brushing his teeth, he felt something tickling his chest and looked down to see a tiny five-pointed star on a thin golden chain. He couldn't believe his eyes. This time his dream had come true! ...After he'd dressed, he took the chain off and stuck it in his pocket: he didn't want his mother asking silly questions. ...Where'd that star come from? she'd want to know the minute she saw it. Boys don't wear jewelry! ...How could he tell her
I really enjoyed The Number Devil. I thought that it was a worthwhile book and if you are having trouble in math, it can really help you. I thought that the book was very good in its way of delivering the information. Robert, the main character, is always asleep when he is with the Number Devil and in his dream world, math is completely different from ours. One thing i didn't really like about the book is how they do not always use real math terms. They use words like coconuts and rutabagas and...more
This summer I decided to read the book The Number Devil: A Mathematical Adventure by Hans Magnus Enzensberger. The story is about a boy named Robert who hates math because he finds it very boring at school. He keeps dreaming about being eaten by a giant fish or sliding down a never ending slide until one night he suddenly finds himself dreaming about meeting the Number Devil (Teplotaxl). During the twelve nights Robert finds himself learning different mathematical principles every night.
In the...more
Jairo Guzman
Enzensberger tells a story of Robert, a young boy with mediocre math skills, and his journey through the world of mathematics under the tutoring of the number devil, a black-bearded, irascible, red man. In Enzensberger's The number devil, the boy Robert is able to contact this devil through 12 dreams and learns that math isn’t that bad at all. The whole purpose of this book is to reveal to young people that mathematics is something worth exploring and not just a sadistic intellectual exercise ma...more
Ini bukan dongeng, bukan pula memoar. Tapi kejadian-kejadian yang ada dalam buku ini bisa saja Anda alami di kehidupan Anda.

Perkenalkan Robert, seorang anak berumur 12 tahun yang sangat membenci matematika dan terutama guru matematikanya. Baginya angka-angka dan segala macam hitung-hitungan adalah hal yang menjemukan. Tapi, pandangannya tersebut perlahan-lahan berubah sejak bertemu Setan Angka dalam mimpinya. Dari malam ke malam Setan Angka mengajaknya bertualang menjelajahi dunia matematika. Se
Grazie mille Enzensberger!
Sapevo che la matematica può essere divertente (anche se i professori evitano accuratamente di farti conoscere questo lato) ma che fosse così spassosa, quello no, non l'avrei immaginato. Dodici notti, dodici sogni per insegnare a Roberto come funzionano le cose e che alla fine non è il caso di avere paura. Robero è fantastico! Il modo di rispondere, di fare, non sembra un bambino di 10 anni, come tralatro si evince anche dalla copertina (anche perchè esprimo qualche pe...more
What do you get when you cross Alice in Wonderland with a small, red, horned man obsessed with numbers? No, it isn't an arithmetic problem - it's a middle school math primer!
Robert, a boy who hates math and is frustrated because his teacher doesn't allow calculators, has strange dreams all the time. One night he dreams up a character called the Number Devil, who takes him away to a surreal world of numbers where Robert learns basic math concepts and a few handy shortcuts. After all, says the Num...more
A cute book that holds many of the same principals as Magic House of Numbers, but is written with a middle school/very late elementary school audience in mind.

Some great (and advanced) mathematical ideas are presented in here. These include some ideas as young as Russel's Paradox or Countable Infinities. Others are much older (Pascal's Triangle and Diagonal length of squares). All of this told in a quiet, simple manner akin to Daniel Quinn's Ishmael - though a little more entertaining than that...more
This book has the same artist as one of our favorite children's books: In the Town, All Year Round.

I'm not sure what to say about this one. Who would I recommend it to?

Not math people - The terminology will drive this reader crazy! The author took math terms and called them something else. For example, instead of "the square root of 9 equals 3," it was "the rutabaga of 9 equals 3." OOOOOOOOKKKKKKKKKKK!

Not non-math people - 1. With the strange verbiage, you won't be able to talk to other people,...more
Math books written in plain English are difficult to find. Math books written in plain English that are also entertaining are nearly nonexistent. Thankfully, there's this one.

I wish I found this book when I was a kid. if I had. my grades probably would have been a lot better than they were.
Very interesting concept. I was expecting something along the lines of The Phantom Tollbooth but this book doesn't even come close to that level of whimsical profoundness. I was definitely disappointed. The encounters between the dreaming child Robert and the Number Devil quickly become repetitive and stale. The author is trying to make children realize for themselves that mathematics are beautiful but the execution of this goal is actually quite ordinary. This book is recommended for kids 10+ b...more
Raka Nouvel
Melihat judulnya sempat terpikir bahwa ini semacam fiksi horor.

Horor? Ya, dengan warna merah yang bernuansa seperti darah, cover dengan judul Setan Angka ini memang sempat membuatku berpikir, "Is that a horor fiction?"

Fiksi? That's true, but horror, absolutely NOT.

Hans Magnus menulis sebuah cerita fiksi tentang matematika. Ya, tentang hal yang kata sebagian orang merupakan pelajaran yang menyebalkan. Rupanya Hans ingin mengajak anak-anak di seluruh dunia yang tidak menyukai matematika menikmati...more
Author: Hans Magnus Enzensberger
Illustrator: Rotraut Susanne Berner
Translator (German to English): Michael Henry Heim
First Published: 1997

For Christmas the 7yo was given the gift of maths, the magic of numbers from a much loved aunt.

Each Day Robert has a dream visit from the Red Devil where he is gifted with a mathematical concept.

Daughter's Review: I liked it because it combined fiction with non fiction and I like Maths. I really liked the pictures maths trick [Day 10].

Day 1: Concept of biggest...more
Um bom livro para jovens que adorem matemática, e para jovens que não adorem matemática.

Um romance que explica de forma simples algumas das bases matemáticas que muitas vezes não aprendemos de forma motivada no ensino obrigatório. Como as aulas de matemática não são dadas como uma "historia" e por vezes se tornam uma "seca" este livro ensina de uma forma alternativa. Não que seja um livro "escolar", mas consegue atrair uma certa curiosidade pela matemática.

Tal como muitos dos alunos de matemátic...more
Apr 25, 2010 Alkhansaa rated it 4 of 5 stars  ·  review of another edition
Recommends it for: أي شخص لا يحب الرياضيات أو إيصال المعلومة
على الأمهات والآباء والمربين أن يتحولوا عفاريت مؤقتا حتى يشرحوا لأطفالهم ما يصعب لهم ...
الكتاب لعبودي -أخي بسنواته التسع- استعرته منه واستمتعت بقرائته كثيراً ..
Vold Kira
Un libro lindo (sobre todo por las excelentes ilustraciones) para "adentrar" al niño al mundo de las matemáticas... O seguir aborreciéndolas.

Hubo momentos en que la lectura se hace tediosa por cómo se explican las cosas, además de llamarle a los números primos, racionales y la secuencia de Fibonacci distinto... Brrr...

Tal vez con éste no hagas que los pequeños quieran ser Físicos Matemáticos de grandes, pero sí puedes sorprenderlos por un ratito con las hechicerías del número phi, la brujería d...more
Bel libro per far avvicinare alla matematica tutti coloro che la detestano (come il sottoscritto). Direi che è adatto a tutti, anche ai grandi :)
Diego Tenorio
Un libro lindo (sobre todo por las excelentes ilustraciones) para "adentrar" al ni��o al mundo de las matem��ticas... O seguir aborreci��ndolas.

Hubo momentos en que la lectura se hace tediosa por c��mo se explican las cosas, adem��s de llamarle a los n��meros primos, racionales y la secuencia de Fibonacci distinto... Brrr...

Tal vez con ��ste no hagas que los peque��os quieran ser F��sicos Matem��ticos de grandes, pero s�� puedes sorprenderlos por un ratito con las hechicer��as del n��mero phi,...more
Maurizio Codogno
Non che sia chissà cosa, però ci sono degli spunti interessanti. Bisognerebbe però vedere cosa ne dice un ragazzino...
Who was the antagonist? Was there a problem? Robert struggled in math. That was the only problem in the book, but the way it was written made it impossible for the reader to tell if it was a serious problem. (It made it seem like Robert simply didn't like math.) There was no plot. It was like a textbook with (underdeveloped) characters. No rising action, no climax, no falling action or conclusion. The most sad thing, though, is that the concepts were actually very interesting, but the execution...more
Ms. Knapp
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 w...more
Numbers. Not good with them. But for someone like me to read this book, The Number Devil surprised me and I had fun reading it. Some of the maths terms in this book had been changed to cater to the children, which makes it easier for me to read. They also changed some mathematicians names to imaginary names. I can identify with the main character, Robert who hates Maths - especially his Maths teacher. His frustration with maths problem sums and he struggle everytime his Maths teacher call on him...more
This book was really weird to pick up but it looked interesting as i flipped through the long pages of this book. It had small pictures and diagram which really surprised me. This book wasn't as great as it looked though.
This book was really good in some way because it had a story line to the math problems that was being given to the main character, Robert. He had trouble in math then everyday in math he would get weird dreams that would somehow teach him a lesson about the things he would not u...more
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