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# Il mago dei numeri

Roberto è uno dei tanti ragazzi per i quali la matematica è un incubo incomprensibile. Una notte gli appare in sogno un curioso ometto rosso che gli propone straordinari giochi di prestigio: non con le carte, ma con i numeri. Per altre undici notti Roberto si addentra così nell'esplorazione dei sistemi numerici complessi, capisce sempre meglio le leggi e i meccanismi che l...more

Paperback, Supercoralli, 263 pages

Published
1997
by Einaudi

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## Community Reviews

(showing
1-30
of
3,000)

Aug 18, 2012
Kelly Maybedog
rated it
2 of 5 stars
·
review of another edition

Shelves:
what-ya-and-children,
abandoned

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.

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

May 17, 2012
Lance Greenfield
rated it
4 of 5 stars
·
review of another edition

Shelves:
comfort-reads

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

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

My Dad made all aspects of mathe...more

Apr 06, 2013
Anne Hamilton
rated it
5 of 5 stars
·
review of another edition

Shelves:
children,
golden-ratio

...more...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

In the...more

Ini bukan dongeng, bukan pula memoar. Tapi kejadian-kejadian yang ada dalam buku ini bisa saja Anda alami di kehidupan Anda....more

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

Aug 30, 2012
Ileen
rated it
3 of 5 stars
·
review of another edition

Shelves:
2010,
scrittori-tedeschi

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

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

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

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

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

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

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

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 ..

الكتاب لعبودي -أخي بسنواته التسع- استعرته منه واستمتعت بقرائته كثيراً ..

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

*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

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

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

topics | posts | views | last activity | |
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An Excellent Book | 1 | 16 | Aug 22, 2008 07:00PM |

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Kelly wrote: "Well betas aren't known for their masterful incite into literary genius but that doesn't mean they don't know good code when they see it...moreAug 18, 2012 08:06PM

[I can't believe I spelled insight wrong.]

updated Aug 20, 2012 06:21PM