The full value of pi. What does Pi hide?

March 14, 2012

On March 14, mathematicians celebrate one of the most unusual holidays - International Pi Day. This date was not chosen by chance: numeric expressionπ (Pi) - 3.14 (3rd month (March) 14th).

For the first time, schoolchildren encounter this unusual number in the elementary grades when studying circles and circumferences. The number π is a mathematical constant that expresses the ratio of the circumference of a circle to the length of its diameter. That is, if you take a circle with a diameter equal to one, then the circumference will be equal to the number “Pi”. The number π has an infinite mathematical duration, but in everyday computing use a simplified spelling of the number, leaving only two decimal places - 3.14.

In 1987, this day was celebrated for the first time. Physicist Larry Shaw from San Francisco noticed that in American system records of dates (month/day) the date March 14 - 3/14 coincides with the number π (π = 3.1415926...). Typically celebrations begin at 1:59:26 pm (π = 3.14 15926 …).

History of Pi

It is assumed that the history of the number π begins in Ancient Egypt. Egyptian mathematicians determined the area of a circle with diameter D as (D-D/9) 2. From this entry it is clear that at that time the number π was equated to the fraction (16/9) 2, or 256/81, i.e. π 3.160...

In the VI century. BC in India, in the religious book of Jainism, there are entries indicating that the number π at that time was accepted as equal square root out of 10, which gives the fraction 3.162...
In the 3rd century. BC Archimedes in his short work “Measurement of a Circle” substantiated three propositions:

Every circle is equal in size right triangle, the legs of which are respectively equal to the length of the circle and its radius;
The areas of a circle are related to a square built on a diameter as 11 to 14;
The ratio of any circle to its diameter is less than 3 1/7 and greater than 3 10/71.

Archimedes justified the last position by sequentially calculating the perimeters of regular inscribed and circumscribed polygons by doubling the number of their sides. According to the exact calculations of Archimedes, the ratio of the circumference to the diameter is between the numbers 3 * 10 / 71 and 3 * 1/7, which means that the number “pi” is 3.1419... The true value of this ratio is 3.1415922653...
In the 5th century BC Chinese mathematician Zu Chongzhi found more exact value this number: 3.1415927...
In the first half of the 15th century. The astronomer and mathematician Kashi calculated π with 16 decimal places.

A century and a half later in Europe, F. Viet found the number π with only 9 regular decimal places: he made 16 doublings of the number of sides of polygons. F. Viet was the first to notice that π can be found using the limits of certain series. This discovery had great value, it made it possible to calculate π with any accuracy.

In 1706, the English mathematician W. Johnson introduced the notation for the ratio of the circumference of a circle to its diameter and designated it with the modern symbol π, the first letter of the Greek word periferia - circle.

For a long period of time, scientists around the world have been trying to unravel the mystery of this mysterious number.

What is the difficulty in calculating the value of π?

The number π is irrational: it cannot be expressed as a fraction p/q, where p and q are integers; this number cannot be the root of an algebraic equation. It is impossible to specify an algebraic or differential equation whose root will be π, therefore this number is called transcendental and is calculated by considering a process and is refined by increasing the steps of the process under consideration. Multiple attempts to calculate maximum quantity signs of the number π have led to the fact that today, thanks to modern computing technology, it is possible to calculate the sequence with an accuracy of 10 trillion digits after the decimal point.

The digits of the decimal representation of π are quite random. In the decimal expansion of a number, you can find any sequence of digits. It is assumed that this number contains all written and unwritten books in encrypted form; any information that can be imagined is found in the number π.

You can try to unravel the mystery of this number yourself. Of course, it will not be possible to write down the number “Pi” in full. But for the most curious, I suggest considering the first 1000 digits of the number π = 3,
1415926535 8979323846 2643383279 5028841971 6939937510 5820974944 5923078164 0628620899 8628034825 3421170679 8214808651 3282306647 0938446095 5058223172 5359408128 4811174502 8410270193 8521105559 6446229489 5493038196 4428810975 6659334461 2847564823 3786783165 2712019091 4564856692 3460348610 4543266482 1339360726 0249141273 7245870066 0631558817 4881520920 9628292540 9171536436 7892590360 0113305305 4882046652 1384146951 9415116094 3305727036 5759591953 0921861173 8193261179 3105118548 0744623799 6274956735 1885752724 8912279381 8301194912 9833673362 4406566430 8602139494 6395224737 1907021798 6094370277 0539217176 2931767523 8467481846 7669405132 0005681271 4526356082 7785771342 7577896091 7363717872 1468440901 2249534301 4654958537 1050792279 6892589235 4201995611 2129021960 8640344181 5981362977 4771309960 5187072113 4999999837 2978049951 0597317328 1609631859 5024459455 3469083026 4252230825 3344685035 2619311881 7101000313 7838752886 5875332083 8142061717 7669147303 5982534904 2875546873 1159562863 8823537875 9375195778 1857780532 1712268066 1300192787 6611195909 2164201989

Remember the number "Pi"

Currently, with the help of computer technology, ten trillion digits of the number “Pi” have been calculated. The maximum number of numbers that a person could remember is one hundred thousand.

To remember the maximum number of digits of the number “Pi”, various poetic “memories” are used, in which words with a certain number of letters are arranged in the same sequence as the numbers in the number “Pi”: 3.1415926535897932384626433832795…. To restore the number, you need to count the number of characters in each word and write it down in order.

So I know the number called “Pi”. Well done! (7 digits)

So Misha and Anyuta came running
They wanted to know the number Pi. (11 digits)

This I know and remember perfectly:
And many signs are unnecessary for me, in vain.
Let's trust our enormous knowledge
Those who counted the numbers of the armada. (21 digits)

Once at Kolya and Arina's
We ripped the feather beds.
The white fluff was flying and spinning,
Showered, froze,
Satisfied
He gave it to us
Old women's headache.
Wow, the spirit of fluff is dangerous! (25 characters)

You can use rhyming lines to help you remember the right number.

So that we don't make mistakes,
You need to read it correctly:
Ninety two and six

If you try really hard,
You can immediately read:
Three, fourteen, fifteen,
Ninety two and six.

Three, fourteen, fifteen,
Nine, two, six, five, three, five.
So that do science,
Everyone should know this.

You can just try
And repeat more often:
"Three, fourteen, fifteen,
Nine, twenty-six and five."

Still have questions? Want to know more about Pi?
To get help from a tutor, register.
The first lesson is free!

If you compare circles of different sizes, you will notice the following: the sizes of different circles are proportional. This means that when the diameter of a circle increases by a certain number of times, the length of this circle also increases by the same number of times. Mathematically this can be written like this:

C 1		C 2
	=
d 1		d 2	(1)

where C1 and C2 are the lengths of two different circles, and d1 and d2 are their diameters.
This relationship works in the presence of a coefficient of proportionality - the constant π, already familiar to us. From relation (1) we can conclude: the length of a circle C is equal to the product of the diameter of this circle and a proportionality coefficient π independent of the circle:

C = π d.

This formula can also be written in another form, expressing the diameter d through the radius R of a given circle:

С = 2π R.

This formula is precisely the guide to the world of circles for seventh graders.

Since ancient times, people have tried to establish the value of this constant. For example, the inhabitants of Mesopotamia calculated the area of a circle using the formula:

Where does π = 3 come from?

In ancient Egypt, the value for π was more precise. In 2000-1700 BC, a scribe called Ahmes compiled a papyrus in which we find recipes for solving various practical problems. So, for example, to find the area of a circle, he uses the formula:

			8			2
S	=	(		d	)
			9

From what reasons did he arrive at this formula? – Unknown. Probably based on his observations, however, as other ancient philosophers did.

In the footsteps of Archimedes

Which of the two numbers is greater than 22/7 or 3.14?
- They are equal.
- Why?
- Each of them is equal to π.
A. A. Vlasov. From the Examination Card.

Some people believe that the fraction 22/7 and the number π are identically equal. But this is a misconception. In addition to the above incorrect answer in the exam (see epigraph), you can also add one very entertaining puzzle to this group. The task reads: “arrange one match so that the equality becomes true.”

The solution would be this: you need to form a “roof” for the two vertical matches on the left, using one of the vertical matches in the denominator on the right. You will get a visual image of the letter π.

Many people know that the approximation π = 22/7 was determined by the ancient Greek mathematician Archimedes. In honor of this, this approximation is often called the “Archimedean” number. Archimedes managed not only to establish an approximate value for π, but also to find the accuracy of this approximation, namely, to find a narrow numerical interval to which the value π belongs. In one of his works, Archimedes proves a chain of inequalities that modern style would look like this:

	10		6336					14688				1
3		<			<	π	<			<	3
	71			1					1			7
			2017					4673
				4					2

can be written more simply: 3,140 909< π < 3,1 428 265...

As we can see from the inequalities, Archimedes found a fairly accurate value with an accuracy of up to 0.002. The most surprising thing is that he found the first two decimal places: 3.14... This is the value we most often use in simple calculations.

Practical Application

Two people are traveling on a train:
- Look, the rails are straight, the wheels are round.
Where is the knock coming from?
- Where from? The wheels are round, but the area
circle pi er square, that’s the square that knocks!

As a rule, they become acquainted with this amazing number in the 6th-7th grade, but study it more thoroughly by the end of the 8th grade. In this part of the article we will present the basic and most important formulas that will be useful to you in solving geometric problems, but to begin with we will agree to take π as 3.14 for ease of calculation.

Perhaps the most famous formula among schoolchildren that uses π is the formula for the length and area of a circle. The first, the formula for the area of a circle, is written as follows:

	π *D 2*
*S=π R 2 =*
	4

where S is the area of the circle, R is its radius, D is the diameter of the circle.

The circumference of a circle, or, as it is sometimes called, the perimeter of a circle, is calculated by the formula:

C = 2 π R = π d,

where C is the circumference, R is the radius, d is the diameter of the circle.

It is clear that the diameter d is equal to two radii R.

From the formula for circumference, you can easily find the radius of the circle:

where D is the diameter, C is the circumference, R is the radius of the circle.

These are basic formulas that every student should know. Also, sometimes it is necessary to calculate the area not of the entire circle, but only of its part - the sector. Therefore, we present it to you - a formula for calculating the area of a sector of a circle. It looks like this:

			α
S	=	*π R 2*
			360 ˚

where S is the area of the sector, R is the radius of the circle, α is the central angle in degrees.

So mysterious 3.14

Indeed, it is mysterious. Because in honor of these magical numbers they organize holidays, make films, hold public events, write poetry and much more.

For example, in 1998, a film by American director Darren Aronofsky called “Pi” was released. The film received many awards.

Every year on March 14 at 1:59:26 a.m., people interested in mathematics celebrate "Pi Day." For the holiday, people prepare a round cake, sit at a round table and discuss the number Pi, solve problems and puzzles related to Pi.

Poets also paid attention to this amazing number; an unknown person wrote:
You just have to try and remember everything as it is - three, fourteen, fifteen, ninety-two and six.

Let's have some fun!

We offer you interesting puzzles with the number Pi. Unravel the words that are encrypted below.

1. π r

2. π L

3. π k

Answers: 1. Feast; 2. File; 3. Squeak.

The meaning of the number "Pi", as well as its symbolism, is known all over the world. This term denotes irrational numbers (that is, their value cannot be accurately expressed as a fraction y/x, where y and x are integers) and is borrowed from the ancient Greek phraseology "perepheria", which can be translated into Russian as "circle".
The number "Pi" in mathematics denotes the ratio of the circumference of a circle to the length of its diameter. The history of the origin of the number "Pi" goes back to the distant past. Many historians have tried to establish when and by whom this symbol was invented, but they were never able to find out.

Pi is a transcendental number, or saying in simple words it cannot be the root of some polynomial with integer coefficients. It can be designated as a real number or as an indirect number that is not algebraic.

The number "Pi" is 3.1415926535 8979323846 2643383279 5028841971 6939937510...

Pi may not only be an irrational number that cannot be expressed using several different numbers. The number "Pi" can be represented by a certain decimal, which has an infinite number of digits after the decimal point. More interesting point- all these numbers cannot be repeated.

Pi can be correlated with the fractional number 22/7, the so-called “triple octave” symbol. The ancient Greek priests knew this number. In addition, even ordinary residents could use it to solve any everyday problems, and also used for designing such the most complex buildings like tombs.
According to scientist and researcher Hayens, a similar number can be traced among the ruins of Stonehenge, and also found in the Mexican pyramids.

Pi Ahmes, a famous engineer at that time, mentioned in his writings. He tried to calculate it as accurately as possible by measuring the diameter of the circle using the squares drawn inside it. Probably in some sense this number has some mystical, sacred meaning for the ancients.

Pi is essentially the most mysterious mathematical symbol. It can be classified as delta, omega, etc. It represents a relationship that will turn out to be exactly the same, regardless of what point in the universe the observer will be located. In addition, it will be unchanged from the object of measurement.

Most likely, the first person who decided to calculate the number "Pi" using mathematical method is Archimedes. He decided to draw regular polygons in a circle. Considering the diameter of a circle to be one, the scientist designated the perimeter of a polygon drawn in a circle, considering the perimeter of an inscribed polygon as an upper estimate, and as a lower estimate of the circumference

What is the number "Pi"

(), and it became generally accepted after the work of Euler. This designation comes from the initial letter of the Greek words περιφέρεια - circle, periphery and περίμετρος - perimeter.

Ratings

510 decimal places: π ≈ 3.141 592 653 589 793 238 462 643 383 279 502 884 197 169 399 375 105 820 974 944 592 307 816 406 286 208 998 628 034 825 342 117 067 982 148 086 513 282 306 647 093 844 609 550 582 231 725 359 408 128 481 117 450 284 102 701 938 521 105 559 644 622 948 954 930 381 964 428 810 975 665 933 446 12 8 475 648 233 786 783 165 271 201 909 145 648 566 923 460 348 610 454 326 648 213 393 607 260 249 141 273 724 587 006 606 315 588 174 881 520 920 962 829 254 091 715 364 367 892 590 360 011 330 530 8 820 466 521 384 146 951 941 511 609 433 057 270 365 759 591 953 092 186 117 381 932 611 793 105 118 548 074 462 379 962 749 567 351 885 752 724 891 227 938 183 011 949 129 833 673 362…

Properties

Ratios

There are many known formulas with the number π:

Wallis formula:

Euler's identity:

T.n. "Poisson integral" or "Gauss integral"

Transcendence and irrationality

Unsolved problems

It is not known whether the numbers π and e algebraically independent.
It is unknown whether the numbers π + e , π − e , π e , π / e , π e , π π , e e transcendental.
Until now, nothing is known about the normality of the number π; it is not even known which of the digits 0-9 appear in the decimal representation of the number π an infinite number of times.

Calculation history

and Chudnovsky

Mnemonic rules

So that we do not make mistakes, We must read correctly: Three, fourteen, fifteen, ninety-two and six. You just have to try and remember everything as it is: Three, fourteen, fifteen, ninety-two and six. Three, fourteen, fifteen, nine, two, six, five, three, five. To do science, everyone should know this. You can just try and repeat more often: “Three, fourteen, fifteen, Nine, twenty-six and five.”

2. Count the number of letters in each word in the phrases below ( excluding punctuation marks) and write down these numbers in a row - not forgetting about the decimal point after the first digit “3”, of course. The result will be an approximate number of Pi.

This I know and remember perfectly: But many signs are unnecessary for me, in vain.

Whoever, jokingly and soon, wishes Pi to know the number - already knows!

So Misha and Anyuta came running and wanted to find out the number.

(The second mnemonic is correct (with rounding of the last digit) only when using pre-reform spelling: when counting the number of letters in words, it is necessary to take into account hard signs!)

Another version of this mnemonic notation:

This I know and remember perfectly:
And many signs are unnecessary for me, in vain.
Let's trust our enormous knowledge
Those who counted the numbers of the armada.

Once at Kolya and Arina's We ripped the feather beds. The white fluff was flying and spinning, Showered, froze, Satisfied He gave it to us Old women's headache. Wow, the spirit of fluff is dangerous!

If you follow the poetic meter, you can quickly remember:

Three, fourteen, fifteen, nine two, six five, three five
Eight nine, seven and nine, three two, three eight, forty six
Two six four, three three eight, three two seven nine, five zero two
Eight eight and four, nineteen, seven, one

Fun facts

Notes

See what “Pi” is in other dictionaries:

number- Receiving source: GOST 111 90: Sheet glass. Specifications original document See also related terms: 109. The number of betatron oscillations ... Dictionary-reference book of terms of normative and technical documentation

Noun, s., used. very often Morphology: (no) what? numbers, what? number, (see) what? number, what? number, about what? about number; pl. What? numbers, (no) what? numbers, why? numbers, (see) what? numbers, what? numbers, about what? about numbers mathematics 1. By number... ... Dictionary Dmitrieva

NUMBER, numbers, plural. numbers, numbers, numbers, cf. 1. Concept, expressive quantity, that by which objects and phenomena are counted (mat.). Integer. Fractional number. Named number. Prime number. (see simple 1 in 1 value).… … Ushakov's Explanatory Dictionary

An abstract designation devoid of special content for any member of a certain series, in which this member is preceded or followed by some other specific member; abstract individual attribute that distinguishes one set from... ... Philosophical Encyclopedia

Number- Number is a grammatical category expressing quantitative characteristics objects of thought. Grammatical number is one of the manifestations of the more general linguistic category of quantity (see Language category) along with the lexical manifestation (“lexical... ... Linguistic encyclopedic dictionary

A number approximately equal to 2.718, which is often found in mathematics and science. For example, during the collapse radioactive substance after time t, a portion of the initial amount of substance remains equal to e kt, where k is a number,... ... Collier's Encyclopedia

A; pl. numbers, sat, slam; Wed 1. A unit of account expressing a particular quantity. Fractional, integer, prime hours. Even, odd hours. Count in round numbers (approximately, counting in whole units or tens). Natural h. (positive integer... Encyclopedic Dictionary

Wed. quantity, by count, to the question: how much? and the very sign expressing quantity, number. Without number; there is no number, without counting, many, many. Set up cutlery according to the number of guests. Roman, Arabic or church numbers. Integer, opposite. fraction... ... Dahl's Explanatory Dictionary

There are a lot of mysteries among the PIs. Or rather, these are not even riddles, but a kind of Truth that no one has yet solved in the entire history of mankind...

What is Pi? The PI number is a mathematical “constant” that expresses the ratio of the circumference of a circle to its diameter. At first, out of ignorance, it (this ratio) was considered equal to three, which was a rough approximation, but it was enough for them. But when prehistoric times gave way to ancient times (i.e., already historical), the surprise of inquisitive minds knew no bounds: it turned out that the number three very inaccurately expresses this ratio. With the passage of time and the development of science, this number began to be considered equal to twenty-two sevenths.

The English mathematician Augustus de Morgan once called the number PI “... the mysterious number 3.14159... that crawls through the door, through the window and through the roof.” Tireless scientists continued and continued to calculate the decimal places of the number Pi, which is actually a wildly non-trivial task, because you can’t just calculate it in a column: the number is not only irrational, but also transcendental (these are just such numbers that cannot be calculated by simple equations).

In the process of calculating these same signs, many different scientific methods and entire sciences. But the most important thing is that there are no repetitions in the decimal part of pi, as in an ordinary periodic fraction, and the number of decimal places is infinite. Today it has been verified that there are indeed no repetitions in 500 billion digits of pi. There is reason to believe that there are none at all.

Since there are no repetitions in the sequence of pi signs, this means that the sequence of pi signs obeys the theory of chaos, or more precisely, the number pi is chaos written in numbers. Moreover, if desired, this chaos can be represented graphically, and there is an assumption that this Chaos is intelligent.

In 1965, the American mathematician M. Ulam, sitting at one boring meeting, with nothing to do, began to write the numbers included in pi on checkered paper. Putting 3 in the center and moving counterclockwise in a spiral, he wrote out 1, 4, 1, 5, 9, 2, 6, 5 and other numbers after the decimal point. Along the way, he circled everything prime numbers in circles. Imagine his surprise and horror when the circles began to line up along straight lines!

In the decimal tail of pi you can find any desired sequence of digits. Any sequence of digits in the decimal places of pi will be found sooner or later. Any!

So what? – you ask. Otherwise... Think about it: if your phone is there (and it is), then there is also the phone number of the girl who didn’t want to give you her number. Moreover, there are credit card numbers, and even all the values of the winning numbers for tomorrow's lottery draw. What is there, in general, all lotteries for many millennia to come. The question is how to find them there...

If you encrypt all the letters with numbers, then in the decimal expansion of the number pi you can find all the world literature and science, and the recipe for making bechamel sauce, and all the holy books of all religions. This is strict scientific fact. After all, the sequence is INFINITE and the combinations in the number PI are not repeated, therefore it contains ALL combinations of numbers, and this has already been proven. And if everything, then ALL. Including those that correspond to the book you have chosen.

And this again means that it contains not only all world literature, which has already been written (in particular, those books that burned, etc.), but also all the books that still WILL be written. Including your articles on websites. It turns out that this number (the only reasonable number in the Universe!) governs our world. You just need to look at more signs, find the right area and decipher it. This is somewhat akin to the paradox of a herd of chimpanzees hammering away at a keyboard. Given a long enough experiment (you can even estimate the time) they will print all of Shakespeare's plays.

This immediately suggests an analogy with periodically appearing reports that in Old Testament, allegedly, encoded messages to descendants that can be read using clever programs. It is not entirely wise to immediately dismiss such an exotic feature of the Bible; cabalists have been searching for such prophecies for centuries, but I would like to cite the message of one researcher who, using a computer, found words in the Old Testament that there are no prophecies in the Old Testament. Most likely, in a very large text, as well as in the infinite digits of the PI number, it is possible not only to encode any information, but also to “find” phrases that were not originally included there.

For practice, 11 characters after the dot are enough within the Earth. Then, knowing that the radius of the Earth is 6400 km or 6.4 * 1012 millimeters, it turns out that if we discard the twelfth digit in the PI number after the point when calculating the length of the meridian, we will be mistaken by several millimeters. And when calculating the length of the Earth’s orbit when rotating around the Sun (as is known, R = 150 * 106 km = 1.5 * 1014 mm), for the same accuracy it is enough to use the number PI with fourteen digits after the dot, and what’s there to waste - the diameter of our Galaxies are about 100,000 light years away (1 light year is approximately equal to 1013 km) or 1018 km or 1030 mm, and back in the 17th century, 34 digits of the PI number were obtained, excessive for such distances, and them on at the moment calculated to 12411 trillionth digit!!!

The absence of periodically repeating numbers, namely, based on their formula Circumference = Pi * D, the circle does not close, since there is no finite number. This fact can also be closely related to the spiral manifestation in our lives...

There is also a hypothesis that all (or some) universal constants (Planck’s constant, Euler’s number, universal gravitational constant, electron charge, etc.) change their values over time, as the curvature of space changes due to the redistribution of matter or for other reasons unknown to us.

At the risk of incurring the wrath of the enlightened community, we can assume that the PI number considered today, reflecting the properties of the Universe, may change over time. In any case, no one can forbid us to re-find the value of the number PI, confirming (or not confirming) the existing values.

10 interesting facts about PI number

1. The history of numbers goes back more than one thousand years, almost as long as the science of mathematics has existed. Of course, the exact value of the number was not immediately calculated. At first, the ratio of circumference to diameter was considered equal to 3. But over time, when architecture began to develop, more was required precise measurement. By the way, the number existed, but it received a letter designation only at the beginning of the 18th century (1706) and comes from the initial letters of two Greek words meaning “circle” and “perimeter”. The letter “π” was given to the number by the mathematician Jones, and it became firmly established in mathematics already in 1737.

2. In different eras and different nations Pi had different meaning. For example, in Ancient Egypt it was equal to 3.1604, among the Hindus it acquired a value of 3.162, and the Chinese used a number equal to 3.1459. Over time, π was calculated more and more accurately, and when computing technology, that is, a computer, appeared, it began to number more than 4 billion characters.

3. There is a legend, or rather experts believe so, that the number Pi was used during construction Tower of Babel. However, it was not the wrath of God that caused its collapse, but incorrect calculations during construction. Like, the ancient masters were wrong. A similar version exists regarding the Temple of Solomon.

4. It is noteworthy that they tried to introduce the value of Pi even at the state level, that is, through law. In 1897, the state of Indiana prepared a bill. According to the document, Pi was 3.2. However, scientists intervened in time and thus prevented the mistake. In particular, Professor Perdue, who was present at the legislative meeting, spoke out against the bill.

5. Interestingly, several numbers in the infinite sequence Pi have their own name. So, six nines of Pi are named after the American physicist. Richard Feynman once gave a lecture and stunned the audience with a remark. He said he wanted to memorize the digits of Pi up to six nines, only to say "nine" six times at the end of the story, implying that its meaning was rational. When in fact it is irrational.

6. Mathematicians around the world do not stop conducting research related to the number Pi. It is literally shrouded in some mystery. Some theorists even believe that it contains universal truth. To share knowledge and new information Oh Pi, we organized a Pi Club. It’s not easy to join; you need to have an extraordinary memory. Thus, those wishing to become a member of the club are examined: a person must recite from memory as many signs of the number Pi as possible.

7. They even came up with various techniques to remember the number Pi after the decimal point. For example, they come up with entire texts. In them, words have the same number of letters as the corresponding number after the decimal point. To make it even easier to remember such a long number, they compose poems according to the same principle. Members of the Pi Club often have fun in this way, and at the same time train their memory and intelligence. For example, Mike Keith had such a hobby, who eighteen years ago came up with a story in which each word was equal to almost four thousand (3834) of the first digits of Pi.

8. There are even people who have set records for memorizing Pi signs. So, in Japan, Akira Haraguchi memorized more than eighty-three thousand characters. But the domestic record is not so outstanding. A resident of Chelyabinsk managed to recite by heart only two and a half thousand numbers after the decimal point of Pi.

9. Pi Day has been celebrated for more than a quarter of a century, since 1988. One day, Larry Shaw, a physicist from the popular science museum in San Francisco, noticed that March 14, when written, coincides with the number Pi. In the date, the month and day form 3.14.

10. There is an interesting coincidence. The great one was born on March 14 scientist Albert Einstein, who, as you know, created the theory of relativity.