# [Leggi] Ê Der Zahlenteufel Ein Kopfkissenbuch für alle die Angst vor der Mathematik haben Autore Hans Magnus Enzensberger – mymaxlinks.us

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Becomes a modern classic It certainly deserves just such an accolade Alice in Wonderland was written by the mathematician and theologian Rev Charles Lutwidge Dodgson nder the pseudonym Lewis Carroll The famous answer forty two to the estion in The Hitchhiker s Guide to the Galaxy What is the answer to life the niverse and everything is taken from Alice Through the Looking Glass Pythagoras was admired by Plato who sed some of his ideas particularly in what is called the geometry of the Platonic solids The incident at the very end of The Number Devil is similar to a story told of Karl Gauss The boy later to become The Prince of Mathematicians was in a class asked by the teacher to add p all the numbers from 1 to 100 Almost at once Gauss had the correct answer not a calculator in sight either He sed the same techniue Robert ses to work out the answer January 8 2019 4 StarsI read this with my grade six students They figured out the problems as we went The storyplot itself was kind of boring but I enjoyed the problems and the student solving them 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 p 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 twelve different nights he learns about different math concepts from a dream guide who calls himself a Number Devil The devil presents math concepts in kid friendly terms and even ses kid friendly language to describe them For example instead of sing the term exponents the devil ses the term hopping he also calls prime numbers prima donna numbers And obvious spoiler but Robert comes to appreciate math by the end of the book My first criticism is that half of the number concepts aren t described as cleverly as prima donna numbers Calling Fibonacci numbers Bonacci numbers or Pascal s Triangle a Numbers Triangle is simply lazy My second and bigger criticism is that the prose is terrible The dialogue between Robert and the devil reads far less like a boy talking to a dream figure and like a math teacher talking to an imaginary student who is engaged in his lesson I like math and find it fascinating but this book irritated me than made me appreciate numbers I m sure math teachers are massive fans of this book I was not 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 seful tricks with numbersWhen you enjoy something and gain immediate benefit you obviously learn My Dad made all aspects of mathematics enjoyable for me from a very early age almostFROM WHEN I COULD WALK AND TALK BY RELATINGwhen I could walk and talk by relating we were seeing in the real world to mathematics in

some way He didn t label the principles as geometry algebra arithmeticway He didn t label the principles as geometry algebra arithmetic so on He just mde it all part of my world Consuently I never scored less than 90% in any maths test or exam in my life I just enjoy maths as much as livingThe same holds for Robert and for readers of this lovely little bookMy grandson was hating maths and couldn t see the point When I took him through the first chapter of The Number Devil he could suddenly and effortlessly multiply 11 by 11 1111 by 1111 1111111 by 1111111 and so on He also learned through self motivation inspired by his new trick to multiply any number you could throw at him by elevenThis may seem a small step but you can believe me when I tell you that it was a massive step for Alfie Further he couldn t wait to get to school the next day to show his new skills to his class mates and his teacherThat wasn t all There was much magic to be revealed in this great little book and I would encourage anyone to share it with their children even if they are already very numerate It just gives them and you a new spin on an ancient subject 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 primerRobert 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 p 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 Number Devil you learn best when you

SLEEPOVER THE COURSE OF 12 DIFFERENTthe course of 12 different Robert learns factorials how to find a suare root and Concepts such as the importance of the number zero and the idea of infinity are stressed over and over Robert discovers triangle number Bonacci numbers imaginary numbers and irrational numbers Did you know that you can take any even number larger than two and find 2 prime number that add p to it Robert is even able to apply what he s learned in an actual math classThe Number Devil makes p fun and punny terms for things Roots become rutabagas a root vegetable and prime numbers are prima donnas Suaring becomes number. Matematica perché insegnata male da n professore antipatico alla scoperta del pae. This book told as a 12 nights dream of a child with a mathematical devil is a serious attempt to prove that mathematics can be entertaininginterestingbeautiful and fun and not a boringuselessugly and hermetic subjectIt is aimed mainly to young teensbut is also enjoyable by adults that for some reason hate the maths or have a wrong concept of this fieldIs a tale where departing of elemental concepts as natural numbersprime numberspowers and suare roots introduce advanced concepts as triangular numbersPascal triangle and his propertiespermutationscombinationsproperties of numerable sets of numbersconvergence of power seriesdivergence of armonic series and a introduction to topological results as the Euler characteristic of a graph and a poliedre and the Klein bottle ending with reflections of the idea of mathematical demostration and a brief decription of the greatest mathematiciansIt has

no demostrations only expositions of concepts and resultsAll are explained with a simpledemostrations only expositions of concepts and resultsAll are explained with a simple and clear and beautiful drawings 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 estions 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 it was the emblem of a secret order Perhaps a mathematical fairytale yes what a truly delectable combo is a dubious inclusion in a round O viziune a sentimentelor up of the golden ratio in literature Does a story in which the purpose is clearly didactic and in which the emphasis is on the exposition of the nifty niceties of various numerical patterns reallyalify as literature Isn t a mathematics text thinly disguised as a children s story a bit suspectIn its defence I have to say that The Number Devil does have the three essential C s of a story character conflict and context so I m giving it the benefit of the doubt The plot over floats as lightly as a feather on a froth of allusions to some truly great tales told by or about mathematicians down the ages the mushrooms of Alice in Wonderland make an appearance the cave of Plato is the setting for one of Robert s dreams the anecdote about the schoolmaster and young Karl Gaussis re enacted by Robert and Mr Boekel and the great mathematical mystery which plagued medieval theologians How many angels can dance on the point of a pin is restated in a new guiseAhhh what a glorious book But I didn t give it five stars just because I love mathematics and fairytales I did it because it made a point I ve never ever seen elsewhereRobert the young dreamer of The Number Devil has a problem with mathematics He hates it His teacher the pretzel loving Mr Boekel is apt to ask such sinister Harveys Revised English Grammar uestions as If 2 pretzel makers can make 444 pretzels in 6 hours how long does it take 5 pretzel makers to make 88 pretzels Fortunately for Robert and his mathematical future his dreams are invaded by a chirpy little chap who introduces himself as the number devil Starting with the number one and its properties the number devil explores different facets of the realm of mathematics Robert despite his initial antagonism becomes increasingly intrigued The sixth night of dreaming is devoted to Mr Bonacci and his rabbit clock a peculiar eared device where the markings correspond to months rather than hours while the tenth night of dreaming is devoted to the golden ratio On that night the number devil re introduces the Fibonacci numbers of the sixth night much to Robert s disgust You and your Bonacci he exclaims Tell me is that guy your best friend or something and shows him how the golden ratio is hidden in the seuenceEnzensberger has made an interesting observation at this point and this is what made me decide to include The Number Devil in my catalogue of the golden ratio in literature and to give it five stars I don t know of anyone else who has actually bothered to point out that it s not just the Fibonacci seuence which turnsp the golden ratio Pick any two numbers Robert chooses 11 and 17 and se them as the basis of a Fibonacci like additive seuence add them together then add the last number to the total to make a new term and keep on doing this for as long as you please Pretty soon the ratio of those last two numbers is going to tend towards the golden ratio no matter what initial numbers you chose Is it buried in all numbers Robert asks It is said the number devilAt the end of the book Robert is awarded the Order of Pythagoras Fifth Class and is given a gold star on a chain As ever in The Number Devil no reference is made to the historical precedent no explanation is given about the allusion The five pointed

**"gold star is however the symbol of the Pythagorean Brotherhood and Robert is right in thinking of it as "**star is however the symbol of the Pythagorean Brotherhood and Robert is right in thinking of it as emblem of a secret order It was exactly that the pentagram was called the number of man and was the device by which members recognised each other The Number Devil is a delightful book where even the most whimsical incidents are drawn from the history of mathematics I caught ite a few of the allusions but I suspect just as many went over my head While there s an extra dimension of pleasure in recognising those hidden references the book is truly enjoyable anyway I hope it. Un diavoletto dai mille giochi di prestigio conduce Roberto n ragazzino che odia la. Hopping and factorials are renamed vrooms A warning at the reminds kids to se the proper terms in class The index doubles as a brief glossary defining terms in few wordsIt is truly remarkable how clearly the theories are presented Enzensberger translates math to German and Berner translates the German to English The concepts are well explained and provide jumping off points for many discussions from pyramids to mosaics to biographies of mathematicians Whimsical illustrations and colorful charts and diagrams add to the text Practical applications relate to nature in many cases Bonacci numbers are illustrated with rapidly multiplying bunny rabbits Similar examples would have been great Related activities include playing with number triangles and making 3 D geometric shapes There are no pages of practice problems or exercises although one or two chapters end

With A Uestion For A Student Toa estion for a student to by extrapolating new informationMiddle school teachers can

__up their lectures a chapter from this book Homeschoolers can it as a niue supplemental text While some might object to the negative imagery surrounding math Robert is in number hell and learns from a devil the book may reach some kids relate to the main character This math phobic librarian the only numbers I m good at are Dewey Decimal ones Can t wait for the seuel Great bookIt talks about maths in a way that is as simple as 112I was way behind in maths going into high school and I have learnt so much from this book in 1 2 monthsI learnt stuff like Fractions BonacciFibonacci numbers Decimals Factorial Vroom Hopping numbers Prima Donnas and Triangle numbersMy favorite was the Hopping Numbers I spent a good part of a day just writing them all down I wrote down 55 hopping numbers and the biggest one I did was 18014398509481984 which was too big for my calculator to checkAll Englishmen are liars the man mumbled but if I say it what then I m an Englishman myself so I m lying too But then what I ve just said namely that all Englishmen are liars is not true but if Englishmen tell the truth then what I said before must be true as well In other words we are liarsA must read book DFirst 55 Hopping numbers1 2 4 8 16 32 64 128 256 512 1024 2048 8192 16384 32768 65536 131072 262144 524288 1048576 2097152 4194304 8388608 16777216 33554432 67108864 13427728 268435456 67108864 13427728 268435456 536870912 1073741824 4294967296 8589934592 17179869184 34359738368 68719476736 137438953472 274877906944 549755813888 1099511627776 2199023255552 439846511104 8796093022208 17592186044416 35184372088832 70368744177664 562949953421312 1125899906842624 2251799813685248 4503599627370496 9007199254740992 18014398509481984 Random math thinly disguised as a novel I get what it s trying to do but it feels like the kind of characters that kids textbooks have to make the info 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 This book was by far the most interesting book I have read in years I found it really interesting as the concepts in mathematics were very interesting yet explained in simple terms view spoiler The Number Devil is about a boy named Robert who finds himself dreaming about himself and the Number Devil who has a vast knowledge on mathematics Each night for thirteen nights the Number Devil teaches Robert about numbers and their properties During the earlier nights Robert doesn t appreciate the Number Devil interfering in his dreams but in the later nights Robert looks forward to the Number Devil visiting him and teaching him all about the purpose of numbers There are many properties explored throughout the book like triangle numbers and Bonacci numbers and the book teaches you about concepts these numbers can be applied to in real world situations like the birth of rabbits or the arrangement of desks Towards the end Robert finds that numbers aren t what they seem and that the way you organize them matters When the Number Devil says goodbye Robert feels prepared for his math class as in the beginning of the thirteen nights he hated it and had no interest in it Thanks to the Number Devil he knows and his life in mathematics is easier hide spoiler 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 catch on differently This book would introduce a concept state some random things you could do with it but Multiple Mayhem (Gabby Duran usually not why you might want to and move on without trying to address WHY something was the way it was or multiple learning styles Another thing I couldn t totally get on board with was renaming math concepts I get that some of the terms might have been easier to remember but the real name for them is never mentioned so kids might come away knowing all about prima donna numbers and never put together that they re really called prime numbers And some seemednnecessary is Bonacci numbers really that much easier to remember than Fibonacci numbers I just had such high hopes for this one and came away disappointe. Se incantato dei numeri E il mondo della matematica diventa fantasioso come The Eagles Nest (The New Avengers, una fiab.__

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Hans Magnus Enzensberger

Hans Magnus Enzensberger