Allow me to let you in on a cool secret:
1 Ă 8 + 1 = 9
12 Ă 8 + 2 = 98
123 Ă 8 + 3 = 987
1234 Ă 8 + 4 = 9876
12345 Ă 8 + 5 = 98765
123456 Ă 8 + 6 = 987654
1234567 Ă 8 + 7 = 9876543
12345678 Ă 8 + 8 = 98765432
123456789 Ă 8 + 9 = 987654321
seen from United States
seen from United States
seen from Maldives
seen from Kazakhstan

seen from Germany
seen from Kazakhstan
seen from United States
seen from United States
seen from Uruguay

seen from Germany

seen from United States
seen from Canada
seen from China
seen from Germany
seen from China
seen from Russia

seen from Germany
seen from United States
seen from China
seen from United States
Allow me to let you in on a cool secret:
1 Ă 8 + 1 = 9
12 Ă 8 + 2 = 98
123 Ă 8 + 3 = 987
1234 Ă 8 + 4 = 9876
12345 Ă 8 + 5 = 98765
123456 Ă 8 + 6 = 987654
1234567 Ă 8 + 7 = 9876543
12345678 Ă 8 + 8 = 98765432
123456789 Ă 8 + 9 = 987654321

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I got some very serious "math notes" for ya
Who starts doing calculus to relieve anxiety???? I do. Yes, such people exist.
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.
âThings to Make and Do in the Fourth Dimension:Â A Mathematicianâs Journey Through Narcissistic Numbers, Optimal Dating Algorithms, at Least Two Kinds of Infinity, and Moreâ 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 â 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.
âThe Music of the Primes: Why an unsolved problem in mathematics mattersâ 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 mathematicianâs world and the beauties and mysteries it contains.
âA Brief History of Infinityâ 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.
âProofiness: The Dark Arts of Mathematical Deceptionâ by Charles Seife*
âProofiness,â 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.
âThe Proof Is in the Pudding: The Changing Nature of Mathematical Proofâ 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.
âHow Not to Be Wrong: The Power of Mathematical Thinkingâ byJordan Ellenberg*
How Not to Be Wrong presents the surprising revelations behind some interesting questions, using the mathematicianâs method of analyzing life and exposing the hard-won insights of the academic community to the layman â 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 Scaliaâs views on crime and punishment, the psychology of slime molds, what Facebook can and canât 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 âan atomic-powered prosthesis that you attach to your common sense, vastly multiplying its reach and strength.â 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.
âGĂśdel, Escher, Bach: An Eternal Golden Braidâ by Douglas R. Hofstadter*
Douglas Hofstadterâs book is concerned directly with the nature of âmapsâ 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. GĂśdel, Escher, Bach is a wonderful exploration of fascinating ideas at the heart of cognitive science: meaning, reduction, recursion, and much more.
âHow to Cut a Cake: And Other Mathematical Conundrumsâ by Ian Stewart*
Welcome back to Ian Stewartâs magical world of mathematics! Here are twenty more curious puzzles and fantastical mathematical stories from one of the worldâs 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 chapterâwith titles such as, âHow to Play Poker By Postâ and âRepealing the Law of Averagesââpresents 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.
âThe Mathematical Tourist: New & Updated Snapshots of Modern Mathematicsâ 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 mathematiciansâ 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 â 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 donât 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 â 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.
USA 1984

Anya is live and ready to show you everything. Watch her strip, dance, and perform exclusive shows just for you. Interact in real-time and make your fantasies come true.
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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 canât be replaced with x. θ can be found by pushing the pi button, and selecting the weird circle with a line through it (itâs 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!
me, trying to solve any problem....ever
dirty math joke 1:
secant times x times y