#math fun

[abiwaif]

Allow me to let you in on a cool secret:

1 × 8 + 1 = 9

12 × 8 + 2 = 98

123 × 8 + 3 = 987

1234 × 8 + 4 = 9876

12345 × 8 + 5 = 98765

123456 × 8 + 6 = 987654

1234567 × 8 + 7 = 9876543

12345678 × 8 + 8 = 98765432

123456789 × 8 + 9 = 987654321

[art-of-mathematics]

I got some very serious "math notes" for ya

[underthestarsweliveanddie]

Who starts doing calculus to relieve anxiety???? I do. Yes, such people exist.

[lthmath]

Recently we have been reorganizing our LThMath Book Club. The whole idea behind it is to read and discuss books with other people. We are happy that the Goodreads Club is steadily growing. We also have a Facebook Group with the same idea as the Goodreads one. Hope you all enjoy the idea. Due to this change, we cannot do just a Goodreads poll for the bi-monthly book. Therefor, we decided to do a survey (created using Google forms). In this way more people can vote for the book. If you want to vote, you need to do it HERE.

“Things to Make and Do in the Fourth Dimension: A Mathematician’s Journey Through Narcissistic Numbers, Optimal Dating Algorithms, at Least Two Kinds of Infinity, and More” by Matt Parker*

In the absorbing and exhilarating Things to Make and Do in the Fourth Dimension, Parker sets out to convince his readers to revisit the very math that put them off the subject as fourteen-year-olds. Starting with the foundations of math familiar from school (numbers, geometry, and algebra), he takes us on a grand tour, from four dimensional shapes, knot theory, the mysteries of prime numbers, optimization algorithms, and the math behind barcodes and iPhone screens to the different kinds of infinity ― and slightly beyond. Both playful and sophisticated, Things to Make and Do in the Fourth Dimension is filled with captivating games and puzzles, a buffet of optional hands-on activities that entice us to take pleasure in mathematics at all levels. Parker invites us to relearn much of what baffled us in school and, this time, to be utterly enthralled by it.

“The Music of the Primes: Why an unsolved problem in mathematics matters” by Marcus du Sautoy*

Prime numbers are the very atoms of arithmetic. They also embody one of the most tantalising enigmas in the pursuit of human knowledge. How can one predict when the next prime number will occur? Is there a formula which could generate primes? These apparently simple questions have confounded mathematicians ever since the Ancient Greeks.

In this breathtaking book, mathematician Marcus du Sautoy tells the story of the eccentric and brilliant men who have struggled to solve one of the biggest mysteries in science. It is a story of strange journeys, last-minute escapes from death and the unquenchable thirst for knowledge. Above all, it is a moving and awe-inspiring evocation of the mathematician’s world and the beauties and mysteries it contains.

“A Brief History of Infinity” by Brian Clegg*

Infinity is a concept that fascinates everyone from a seven-year-old child to a maths professor. An exploration of the most mind-boggling feature of maths and physics, this work examines amazing paradoxes and looks at many features of this fascinating concept.

“Proofiness: The Dark Arts of Mathematical Deception” by Charles Seife*

“Proofiness,” as Charles Seife explains in this eye-opening book, is the art of using pure mathematics for impure ends, and he reminds readers that bad mathematics has a dark side. It is used to bring down beloved government officials and to appoint undeserving ones (both Democratic and Republican), to convict the innocent and acquit the guilty, to ruin our economy, and to fix the outcomes of future elections. This penetrating look at the intersection of math and society will appeal to readers of Freakonomics and the books of Malcolm Gladwell.

“The Proof Is in the Pudding: The Changing Nature of Mathematical Proof” by Steven G. Krantz*

This text explores the many transformations that the mathematical proof has undergone from its inception to its versatile, present-day use, considering the advent of high-speed computing machines. Though there are many truths to be discovered in this book, by the end it is clear that there is no formalized approach or standard method of discovery to date. Most of the proofs are discussed in detail with figures and equations accompanying them, allowing both the professional mathematician and those less familiar with mathematics to derive the same joy from reading this book.

“How Not to Be Wrong: The Power of Mathematical Thinking” byJordan Ellenberg*

How Not to Be Wrong presents the surprising revelations behind some interesting questions, using the mathematician’s method of analyzing life and exposing the hard-won insights of the academic community to the layman — minus the jargon. Ellenberg chases mathematical threads through a vast range of time and space, from the everyday to the cosmic, encountering, among other things, baseball, Reaganomics, daring lottery schemes, Voltaire, the replicability crisis in psychology, Italian Renaissance painting, artificial languages, the development of non-Euclidean geometry, the coming obesity apocalypse, Antonin Scalia’s views on crime and punishment, the psychology of slime molds, what Facebook can and can’t figure out about you, and the existence of God.

Ellenberg pulls from history as well as from the latest theoretical developments to provide those not trained in math with the knowledge they need. Math, as Ellenberg says, is “an atomic-powered prosthesis that you attach to your common sense, vastly multiplying its reach and strength.” With the tools of mathematics in hand, you can understand the world in a deeper, more meaningful way. How Not to Be Wrong will show you how.

“Gödel, Escher, Bach: An Eternal Golden Braid” by Douglas R. Hofstadter*

Douglas Hofstadter’s book is concerned directly with the nature of “maps” or links between formal systems. However, according to Hofstadter, the formal system that underlies all mental activity transcends the system that supports it. If life can grow out of the formal chemical substrate of the cell, if consciousness can emerge out of a formal system of firing neurons, then so too will computers attain human intelligence. Gödel, Escher, Bach is a wonderful exploration of fascinating ideas at the heart of cognitive science: meaning, reduction, recursion, and much more.

“How to Cut a Cake: And Other Mathematical Conundrums” by Ian Stewart*

Welcome back to Ian Stewart’s magical world of mathematics! Here are twenty more curious puzzles and fantastical mathematical stories from one of the world’s most popular and accessible writers on mathematics. This is a strange world of never-ending chess games, empires on the moon, furious fireflies, and, of course, disputes over how best to cut a cake. Each chapter–with titles such as, “How to Play Poker By Post” and “Repealing the Law of Averages”–presents a fascinating mathematical puzzle that is challenging, fun, and introduces the reader to a significant mathematical problem in an engaging and witty way. Illustrated with clever and quirky cartoons, each tale will delight those who love puzzles and mathematical conundrums.

“The Mathematical Tourist: New & Updated Snapshots of Modern Mathematics” by Ivars Peterson*

In the first edition of The Mathematical Tourist, renowned science journalist Ivars Peterson took readers on an unforgettable tour through the sometimes bizarre, but always fascinating, landscape of modern mathematics. Now the journey continues in a new, updated edition that includes all the latest information on mathematical proofs, fractals, prime numbers, chaos and much more. Blazing a trail through rows of austere symbols and dense lines of formulae, Peterson explores the central ideas behind the work of professional mathematicians– how and where their pieces of the mathematical puzzle fit in, the sources of their ideas, their fountains of inspiration, and the images that carry them from one discovery to another.

We hope this helped you decide what book you would like to read in August – September with us. Hope you liked this post. Have a great day. You can find us on Facebook,  Tumblr, Twitter and Instagram. We will try to post there as often as possible.

Lots of love and don’t forget that maths is everywhere! Enjoy!

*This post contains affiliate links and I will be compensated if you make a purchase after clicking on my links.

February – March Book Choice Recently we have been reorganizing our LThMath Book Club. The whole idea behind it is to read and discuss books with other people.

[retrocgads]

USA 1984

[strixton]

If anyone has a TI-nspire calculator (CAS or CX), Then I can show you how to make a flower in the graph part

Here are the steps

Turn on the calculator

Open a graphs page

Hit tab

Hit menu

Go to Graph Entry/Edit (for a CX it will be #3)

Select Polar (for a CX it will be #5)

Type in the blank n sin(a θ)

You can replace sin with cos

Boom you have a flower

Remember n and a are numbers you pick. n can be negative. θ is like the x in a rectangular graph, but can’t be replaced with x. θ can be found by pushing the pi button, and selecting the weird circle with a line through it (it’s a Greek letter).

Congratulations you just made a rose curve in your calculator! It is a polar curve graph that makes a flower! If you want another fun graph, you can look up the butterfly curve! Have a nice day!

[dashielvlup]

me, trying to solve any problem....ever

[horrorofthebeast]

dirty math joke 1:

secant times x times y