Uh-oh, it looks like your Internet Explorer is out of date.

For a better shopping experience, please upgrade now.

Thinking In Numbers: On Life, Love, Meaning, and Math

Thinking In Numbers: On Life, Love, Meaning, and Math

4.6 3
by Daniel Tammet

See All Formats & Editions

The irresistibly engaging book that "enlarges one's wonder at Tammet's mind and his all-embracing vision of the world as grounded in numbers." --Oliver Sacks, MD
THINKING IN NUMBERS is the book that Daniel Tammet, mathematical savant and bestselling author, was born to write. In Tammet's world, numbers are beautiful and


The irresistibly engaging book that "enlarges one's wonder at Tammet's mind and his all-embracing vision of the world as grounded in numbers." --Oliver Sacks, MD
THINKING IN NUMBERS is the book that Daniel Tammet, mathematical savant and bestselling author, was born to write. In Tammet's world, numbers are beautiful and mathematics illuminates our lives and minds. Using anecdotes, everyday examples, and ruminations on history, literature, and more, Tammet allows us to share his unique insights and delight in the way numbers, fractions, and equations underpin all our lives.

Inspired variously by the complexity of snowflakes, Anne Boleyn's eleven fingers, and his many siblings, Tammet explores questions such as why time seems to speed up as we age, whether there is such a thing as an average person, and how we can make sense of those we love. His provocative and inspiring new book will change the way you think about math and fire your imagination to view the world with fresh eyes.

Editorial Reviews

Library Journal
Autistic savant Daniel Tammet (Born on a Blue Day: Inside the Extraordinary Mind of an Autistic Savant) talks numbers, and he does so with evident inspiration and awe. Whether or not readers consider themselves mathematically inclined, they will be enthralled. In somewhat autobiographical essays that are conversational in tone Tammet examines topics as disparate as the complexity of snowflakes, the nuances of counting in Icelandic, how big is big, and how Ann Boleyn leaned to count on her eleven fingers. He regales us with discussions that incorporate references to ancient societies, insights into modern usage of language, and sprinkle in the ideas of a wide range of scientists, mathematicians, poets, and novelists. His narration about the time he enumerated the number pi to over 22,000 decimal places is riveting. Tammet enlivens his discussion of numbers with engaging personal components, including a chapter about his mother, an approach that renders his book a delightful read for a broad audience. VERDICT This book will charm just about anyone, but will absolutely captivate sci-tech readers with an interest in mathematics.—Margaret F. Dominy, Drexel Univ. Lib., Philadelphia
Publishers Weekly
An autistic savant shares his insights on mathematics and life in this far-ranging collection of entertaining and thoughtful essays. Tammet’s (Born on a Blue Day) interests are intriguing and stunning in their diversity—one moment he’s considering the existence of extraterrestrial life and breaking down astronomer Frank Drake’s famous equation for calculating the number of intelligent civilizations in the universe; the next, he’s exploring Shakespeare’s fascination with “the presence of absence” and the ways in which nothing can reveal far more than something. The essay “Snowman,” one of the book’s best, is a poetic meditation on snowflakes and what they reveal about complexity. Tammet is a master of gleaning profound insights from seemingly mundane trivia, whether he’s considering the polydactylism of Anne Boleyn, the numberless Kpelle tribe of Liberia, Plato’s insistence that the ideal city be limited to exactly 5040 landholding families, or the mathematics of mortality rates. This is a delightful book, well-suited to random sampling, and capable of bringing even the most numerophobic readers into agreement with Hungarian mathematician Paul Erdos: “I know numbers are beautiful. If they are not beautiful, nothing is.” Tammet’s paean to numbers is proof that Erdos was right. Agent: Andrew Lownie, Andrew Lownie Literary Agency (U.K.). (July 30)
From the Publisher
"Wonderful essays. Admirers of Tammet's Born on a Blue Day and Embracing the Wide Sky will find here fresh reasons to laud the author's gifts." —Booklist (starred review)"

A delightful, diverse collection of essays. Great fun and the perfect gift for any math-phobic person, young or old." —Kirkus Reviews (starred review)"

Tammet is a master of gleaning profound insights from seemingly mundane trivia....This is a delightful book." —Publishers Weekly (starred and boxed review)"

Autistic savant Daniel Tammet talks numbers, and he does so with evident inspiration and awe. Whether or not readers consider themselves mathematically inclined, they will be enthralled. Tammet enlivens his discussion of numbers with engaging personal components...that render his book a delightful read for a broader audience. This book will charm just about anyone, but will absolutely captivate sci-tech readers with an interest in mathematics." —Library Journal (starred review)"

Born on a Blue Day introduced us to the extraordinary phenomenon of Daniel Tammet, and Thinking in Numbers enlarges one's wonder at Tammet's mind and his all-embracing vision of the world as grounded in numbers." —Oliver Sacks, MD"

A engrossing blend of autobiography, mathematical theory, and 'what if' speculations, Daniel Tammet's essays allow us to see the world through the lens of numbers. The result is fascinating, even dizzying series of fresh perspectives on things we thought we knew." —Billy Collins"

Thinking in Numbers is a mind-expanding, kinetic aesthetic experience. My mind shot off the page, spurred to see universal patterns very much alive in everything from the natural world we share to how imagery and metaphor occur in my own creative process. Tammet's poetic mathematics are beautiful guideposts for thinking about life and even love. As I read, I found myself saying, 'Yes, this is true, and this is true, and this is so true...' " —Amy Tan"

Always informative, always entertaining, Daniel Tammet never loses his respect for the mystery of the universe of number." —J. M. Coetzee"

Intriguing, provocative - to wrestle with numbers in this way is an adventure." —Lydia Davis, author of The Collected Stories of Lydia Davis"

How many mathematicians are dazzling storytellers as well? As it turns out, numbers lend themselves powerfully to the realm of narrative, and no explorer of this region is more innovative than Daniel Tammet. What a joy to read an author whose dexterity with digits is matched by his wisdom with words." —David Eagleman, PhD, neuroscientist, author of Incognito and Sum"

As a child in the pre-digital, pre-calculator 1960s, I saved up my allowance money to buy a giant, used, office adding machine. So I approached Daniel Tammet's memoir of hyper-numeracy with a certain sense of kinship. But I was unprepared for the sublime beauty and thoroughgoing charm of his stories. Thinking in Numbers is a magnificently, movingly peculiar and wise book." —Kurt Andersen, author of True Believers and host of Studio 360"

In Thinking in Numbers, you realize that no matter how personable the author or how elegantly breezy his tone, he is not like us. What a pleasure it is, however, to peer inside his utterly singular mind." —Smithsonian"

Tammet approaches numbers in a brilliantly oblique way. Modern readers may feel their jaws dropping at this book's many mathematical whimsies...A transcendent glimpse at a numerate world." —Science News

Kirkus Reviews
A mathematical savant finds the beauty of numbers in unexpected places. Tammet (Embracing the Wide Sky: A Tour Across the Horizons of the Mind, 2009, etc.), a man in love with numbers, reveals more about the mysteries of his mind in this delightful, diverse collection of essays. His topics include the concept of zero, the calendar, prime numbers, chess, time and statistics, but happily, readers need have no previous mathematical skills or knowledge. Several of his pieces have an autobiographical component. His essay on infinity shows him as a young boy discovering the infinity of fractions between two points on his walk home from school, and readers learn of his amazing memory in his account of reciting aloud the decimals of pi to 22,514 places at the University of Oxford's Pi Day. His insights are startling: Tammet sees connections between time tables and proverbs, between prime numbers and haiku, and between rhetoric and math. Trivia fans will find memorable items: His discussion of counting among different cultures reveals that in Icelandic, the word for "four" differs depending on whether one is counting sheep, buses or birthdays, and there is even one astronomer's formula for calculating the number of planets in the galaxy with communicative life. Far from didactic in tone, Tammet fills his essays with stories of real people, from Omar Khayyam to Stephen Jay Gould, from Archimedes and Pythagoras to Tolstoy and Shakespeare, and from Einstein to the author's own mother. The author's fascination with numbers takes him on a wide-ranging tour of history, literature and science, and readers who choose to join him are in for a mind-expanding trip. Great fun and the perfect gift for any math-phobic person, young or old.

Product Details

Little, Brown and Company
Publication date:
Sold by:
Hachette Digital, Inc.
Sales rank:
File size:
1 MB

Read an Excerpt

Thinking In Numbers

On Life, Love, Meaning, and Math

By Daniel Tammet

Little, Brown and Company

Copyright © 2014 Daniel Tammet
All rights reserved.
ISBN: 978-0-316-18737-4



In a smallish London suburb where nothing much ever happened, my family gradually became the talk of the town. Throughout my teens, wherever I went, I would always hear the same question, "How many brothers and sisters do you have?"

The answer, I understood, was already common knowledge. It had passed into the town's body of folklore, exchanged between the residents like a good yarn.

Ever patient, I would dutifully reply, "Five sisters, and three brothers."

These few words never failed to elicit a visible reaction from the listener: brows would furrow, eyes would roll, lips would smile. "Nine children!" they would exclaim, as if they had never imagined that families could come in such sizes.

It was much the same story in school. "J'ai une grande famille" was among the first phrases I learned to say in Monsieur Oiseau's class. From my fellow students, many of whom were single sons or daughters, the sight of us siblings together attracted comments that ranged all the way from faint disdain to outright awe. Our peculiar fame became such that for a time it outdid every other in the town: the one-handed grocer, the enormously obese Indian girl, a neighbor's singing dog, all found themselves temporarily displaced in the local gossip. Effaced as individuals, my brothers, sisters, and I existed only in number. The quality of our quantity became something we could not escape. It preceded us everywhere: even in French, whose adjectives almost always follow the noun (but not when it comes to une grande famille).

With so many siblings to keep an eye on, it is perhaps little wonder that I developed a knack for numbers. From my family I learned that numbers belong to life. The majority of my math acumen came not from books but from regular observations and day-to-day interactions. Numerical patterns, I realized, were the matter of our world. To give an example, we nine children embodied the decimal system of numbers: zero (whenever we were all absent from a place) through to nine. Our behavior even bore some resemblance to the arithmetical: over angry words, we sometimes divided; shifting alliances between my brothers and sisters combined and recombined them into new equations.

We are, my brothers, sisters, and I, in the language of mathematicians, a "set" consisting of nine members. A mathematician would write:

S = {Daniel, Lee, Claire, Steven, Paul, Maria, Natasha, Anna, Shelley}

Put another way, we belong to the category of things that people refer to when they use the number nine. Other sets of this kind include the planets in our solar system (at least, until Pluto's recent demotion to the status of a non- planet), the squares in a game of x's and o's, the players in a baseball team, the muses of Greek mythology, and the Justices of the U.S. Supreme Court. With a little thought, it is possible to come up with others, including:

{February, March, April, May, August, September, October, November, December} where S = the months of the year not beginning with the letter J.

{5, 6, 7, 8, 9, 10, Jack, Queen, King} where S = in poker, the possible high cards in a straight flush.

{1, 4, 9, 16, 25, 36, 49, 64, 81} where S = the square numbers between 1 and 99.

{3, 5, 7, 11, 13, 17, 19, 23, 29} where S = the odd primes below 30.

There are nine of these examples of sets containing nine members, so taken together they provide us with a further instance of just such a set.

Like colors, the commonest numbers give character, form, and dimension to our world. Of the most frequent—zero and one—we might say that they are like black and white, with the other primary colors—red, blue, and yellow—akin to two, three, and four. Nine, then, might be a sort of cobalt or indigo: in a painting it would contribute shading, rather than shape. We expect to come across samples of nine as we might samples of a color like indigo—only occasionally, and in small and subtle ways. Thus a family of nine children surprises as much as a man or woman with cobalt-colored hair.

I would like to suggest another reason for the surprise of my town's residents. I have alluded to the various and alternating combinations and recombinations between my siblings. In how many ways can any set of nine members divide and combine? Put another way, how large is the set of all subsets?

{Daniel} ... {Daniel, Lee} ... {Lee, Claire, Steven} ... {Paul} ... {Lee, Steven, Maria, Shelley} ... {Claire, Natasha} ... {Anna}...

Fortunately, this type of calculation is very familiar to mathematicians. As it turns out, we need only to multiply the number two by itself, as many times as there are members in the set. So, for a set consisting of nine members the answer to our question amounts to: 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 = 512.

This means that there existed in my hometown, at any given place and time, 512 different ways to spot us in one or another combination. 512! It becomes clearer why we attracted so much attention. To the other residents, it really must have seemed that we were legion.

Here is another way to think about the calculation that I set out above. Take any site in the town at random, say a classroom or the municipal swimming pool. The first "2" in the calculation indicates the odds of my being present there at a particular moment (one in two—I am either there, or I am not). The same goes for each of my siblings, which is why two is multiplied by itself a total of nine times.

In precisely one of the possible combinations, every sibling is absent (just as in one of the combinations we are all present). Strange as it may sound, we can even define those sets containing no objects. Mathematicians call them an "empty set." Where sets of nine members embody everything we can think of, touch, or point to when we use the number nine, empty sets are all those that are represented by the value zero. So while a Christmas reunion in my hometown can bring together as many of us as there are Justices on the U.S. Supreme Court, a trip to the moon will unite only as many of us as there are pink elephants, four-sided circles, or people who have swum the breadth of the Atlantic Ocean.

Our mind uses sets when we think and when we perceive just as much as when we count. Our possible thoughts and perceptions about these sets can range almost without limit. Fascinated by the different cultural subdivisions and categories of an infinitely complex world, the Argentine writer Jorge Luis Borges offers a mischievously tongue-in-cheek illustration in his fictional Chinese encyclopedia entitled The Celestial Emporium of Benevolent Knowledge:

Animals are classified as follows: (a) those that belong to the Emperor; (b) embalmed ones; (c) those that are trained; (d) suckling pigs; (e) mermaids; (f) fabulous ones; (g) stray dogs; (h) those that are included in this classification; (i) those that tremble as if they were mad; (j) innumerable ones; (k) those drawn with a very fine camel's-hair brush; (l) et cetera; (m) those that have just broken the flower vase; (n) those that at a distance resemble flies.

Never one to forgo humor in his texts, Borges here also makes several thought- provoking points. First, though a set as familiar to our understanding as that of "animals" implies containment and comprehension, the sheer number of its possible subsets actually swells toward infinity. With their handful of generic labels ("mammal," "reptile," "amphibious," etc.), standard taxonomies conceal this fact. To say, for example, that a flea is tiny, parasitic, and a champion jumper is only to begin to scratch the surface of all its various aspects.

Second, defining a set owes more to art than it does to science. Faced with the problem of a near endless number of potential categories, we are inclined to choose from a few—those most tried and tested within our particular culture. Western descriptions of the set of all elephants privilege subsets like "those that are very large," and "those possessing tusks," and even "those possessing an excellent memory," while excluding other equally legitimate possibilities such as Borges's "those that at a distance resemble flies," or the Hindu "those that are considered lucky."

Memory is a further example of the privileging of certain subsets (of experience) over others, in how we talk and think about a category of things. Asked about his birthday, a man might at once recall the messy slice of chocolate cake that he devoured, his wife's enthusiastic embrace, and the pair of fluorescent green socks that his mother presented to him. At the same time, many hundreds, or thousands, of other details likewise composed his special day, from the mundane (the crumbs from his morning toast that he brushed out of his lap) to the peculiar (a sudden hailstorm on the mid-July afternoon that lasted several minutes). Most of these subsets, though, would have completely slipped his mind.

Returning to Borges's list of subsets of animals, several of the categories pose paradoxes. Take, for example, the subset (j): "innumerable ones." How can any subset of something—even if it is imaginary, like Borges's animals—be infinite in size? How can a part of any collection not be smaller than the whole?

Borges's taxonomy is clearly inspired by the work of Georg Cantor, a nineteenth- century German mathematician whose important discoveries in the study of infinity provide us with an answer to this paradox.

Cantor showed, among other things, that parts of a collection (subsets) as great as the whole (set) really do exist. Counting, he observed, involves matching the members of one set to another. "Two sets A and B have the same number of members if and only if there is a perfect one-to-one correspondence between them." So, by matching each of my siblings and myself to a player on a baseball team, or to a month of the year not beginning with the letter J, I am able to conclude that each of these sets is equivalent, all containing precisely nine members.

Next came Cantor's great mental leap: in the same manner, he compared the set of all natural numbers (1, 2, 3, 4, 5 ...) with each of its subsets such as the even numbers (2, 4, 6, 8, 10 ...), odd numbers (1, 3, 5, 7, 9 ...), and the primes (2, 3, 5, 7, 11 ...). Like the perfect matches between each of the baseball team players and my siblings and me, Cantor found that for each natural number he could uniquely assign an even, an odd, and a prime number. Incredibly, he concluded, there are as "many" even (or odd, or prime) numbers as all the numbers combined.

Reading Borges invites me to consider the wealth of possible subsets into which my family "set" could be classified, far beyond those that simply point to multiplicity. All grown up today, some of my siblings have children of their own. Others have moved far away, to the warmer and more interesting places from where postcards come. The opportunities for us all to get together are rare, which is a great pity. Naturally I am biased, but I love my family. There is a lot of my family to love. But size ceased long ago to be our defining characteristic. We see ourselves in other ways: those that are studious, those that prefer coffee to tea, those that have never planted a flower, those that still laugh in their sleep ...

Like works of literature, mathematical ideas help expand our circle of empathy, liberating us from the tyranny of a single, parochial point of view. Numbers, properly considered, make us better people.



Once upon a time I was a child who loved to read fairy tales. Among my favorites was "The Magic Porridge Pot" by the Brothers Grimm. A poor, good-hearted girl receives from a sorceress a little pot capable of spontaneously concocting as much sweet porridge as the girl and her mother can eat. One day, after eating her fill, the mother's mind goes blank and she forgets the magic words "Stop, little pot."

So it went on cooking and the porridge rose over the edge, and still it cooked on until the kitchen and whole house were full, and then the next house, and then the whole street, just as if it wanted to satisfy the hunger of the whole world.

Only the daughter's return home, and the requisite utterance, finally brings the gooey avalanche to a belated halt.

The Brothers Grimm introduced me to the mystery of infinity. How could so much porridge emerge from so small a pot? It got me thinking. A single flake of porridge was awfully slight. Tip it inside a bowl and one would probably not even spot it for the spoon. The same held for a drop of milk, or a grain of sugar.

What if, I wondered, a magical pot distributed these tiny flakes of porridge and drops of milk and grains of sugar in its own special way? In such a way that each flake and each drop and each grain had its own position in the pot, released from the necessity of touching. I imagined five, ten, fifty, one hundred, one thousand flakes and drops and grains, each indifferent to the next, suspended here and there throughout the curved space like stars. More porridge flakes, more drops of milk, more grains of sugar are added one after another to this evolving constellation, forming microscopic Big Dippers and minuscule Great Bears. Say we reach the ten thousand four hundred and seventy-third flake of porridge. Where do we include it? And here my child's mind imagined all the tiny gaps—thousands of them—between every flake of porridge and drop of milk and grain of sugar. For every minute addition, further tiny gaps would continue to be made. So long as the pot magically prevented any contact between them, every new flake (and drop and granule) would be sure to find its place.

Hans Christian Andersen's "The Princess and the Pea" similarly sent my mind spinning toward the infinite, but this time, an infinity of fractions. One night, a young woman claiming to be a princess knocks at the door of a castle. Outside, a storm is blowing and the pelting rain musses her clothes and turns her golden hair black. So sorry a sight is she that the queen of the castle doubts her story of high birth. To test the young woman's claim, the queen decides to place a pea beneath the bedding on which the woman will sleep for the night (princesses being most delicate creatures!). Her bed is piled to a height of twenty mattresses. But in the morning the woman admits to having hardly slept a wink.

The thought of all those tottering mattresses kept me up long past my own bedtime. By my calculation, a second mattress would double the distance between the princess's back and the offending pea. The tough little legume would therefore be only half as prominent as before. Another mattress reduces the pea's prominence to one-third. But if the young princess's body is sensitive enough to detect one-half of a pea (under two mattresses) or one-third of a pea (under three mattresses), why would it not also be sensitive enough to detect one-twentieth? In fact, possessing limitless sensitivity (this is a fairy tale after all), not even one-hundredth, or one-thousandth or one-millionth of a pea could be tolerably borne.

Which brings us back to the Brothers Grimm and their tale of porridge. For the princess, even a pea felt infinitely big; for the poor daughter and her mother, even an avalanche of porridge reduced to the infinitesimally small.

"You have too much imagination," my father said when I shared these thoughts with him. "You always have your nose in some book." My father kept a pile of paperbacks and regularly bought the weekend papers, but he was never a particularly enthusiastic reader. "Get outdoors more—there's no good being cooped up in here."

Hide-and-seek in the park with my brothers and sisters lasted all of ten minutes. The swings held my attention for about as long. We walked the perimeter of the lake and threw breadcrumbs out onto the grimy water. Even the ducks looked bored.

Games in the yard offered greater entertainment. We fought wars, cast spells, and traveled back in time. In a cardboard box we sailed along the Nile; with a bedsheet we pitched a tent in the hills of Rome. At other times, I would simply stroll the local streets to my heart's content, dreaming up all manner of new adventures and imaginary expeditions.

Excerpted from Thinking In Numbers by Daniel Tammet. Copyright © 2014 Daniel Tammet. Excerpted by permission of Little, Brown and Company.
All rights reserved. No part of this excerpt may be reproduced or reprinted without permission in writing from the publisher.
Excerpts are provided by Dial-A-Book Inc. solely for the personal use of visitors to this web site.


Meet the Author

Daniel Tammet is a writer, linguist and educator. He is the author of Embracing the Wide Sky and the New York Times bestseller Born on a Blue Day. He has appeared on the Late Show With David Letterman, 60 Minutes, and Good Morning America, and has been featured in the New York Times, the Guardian, the Telegraph, and many other publications. He lives in Paris.

Customer Reviews

Average Review:

Post to your social network


Most Helpful Customer Reviews

See all customer reviews

Thinking In Numbers: On Life, Love, Meaning, and Math 4.7 out of 5 based on 0 ratings. 3 reviews.
jmccannAZ More than 1 year ago
Fascinating and insightful collection of essays. When it comes to math and numbers, generally speaking, I am not a fan. I'm a word girl. And yet, in THINKING IN NUMBERS, Daniel Tammet has found a way to help me appreciate the complexity, the magic and, yes, even the beauty he sees in numbers. Early on in this book of essays, Tammet put math into terms I could understand. "Like works of literature," he wrote on page 10, "mathematical ideas help expand our circle of empathy, liberating us from the tyranny of a single, parochial point of view. Numbers, properly considered, make us better people."  While I wasn't quite yet sold that numbers make us better people, I was intrigued by the analogy and compelled to keep reading.  Tammet is an autistic savant (one who broke the world record for reciting from memory more than 22,500 digits of Pi), and some of his essays are pretty heady. I'll admit, he lost me in a few of them, and I was forced to skim. My brain simply could not wrap around some of his ideas. As a person inspired by words and art, I was most drawn to his essays that related math to those elements.  In "Book of Books," Tammet examines the process of novel writing and the infinite possibilities and configurations the author must consider, much like a mathematical equation. And he introduced me to a novel by Julio Cortazar, titled Hopscotch, with a unique structure that enables readers make their own sense of the story. One can read the chapters consecutively from beginning to end, or in reverse order. One can read only the even numbered chapters, or only the prime numbered ones. And each reader will experience a different story. Wow. As a writer, and as a reader, this mathematical concept of a novel structure blew my mind. Many of Tammet's essays were thought provoking, some were whimsical. All offered a unique glimpse into the mind of someone who thinks and views the world in ways far different than I. If you love math, or if you enjoy gaining new perspectives on familiar aspects in life, I highly recommend THINKING IN NUMBERS.  p.s. I also have read, enjoyed and recommend Tammet's memoir, BORN ON A BLUE DAY.
Anonymous More than 1 year ago
rscTN More than 1 year ago
Interesting book:)