## Computational Thinking and Gender

A few weeks ago I was challenged by Professor Mauricio Rosa, from the Faculty of Education at the Federal University

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## Pythagoras in Shaman King

I was happy watching Shaman King (2021) when right in the first episode, I saw something that I couldn’t ignore…

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## At Zero we read “Einstein: o que você quer saber?” by Robert Snedden

I remember the walls of a school where I worked a graffiti by Einstein and the formula E = mc².

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## Birthday Paradigm in Leap Year

The birthday paradigm is a very interesting conditional probability result. You will easily find a blog on the internet explaining

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## The challenge at the gate of the abyss

In the early 70’s when the popularity of chess was on the rise in the world, a rumor emerged among

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## At Zero we read “Matemática: o que você quer saber?” by Anne Rooney

Interesting how in the history of Mathematics we see that several discoveries (let’s call it that) occurred in completely independent

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## At Zero we read “A História da Matemática” by Anne Rooney

Recalling my graduation in Mathematics at USP, I realize how things are presented to us in a direct and final

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## Instant Cube

I don’t ask you to accept anything if you feel there is no basis for it. Soon everyone will agree

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## Regular π-sided polygon?

This week I was talking to my friend Pavel, when I commented on how cool regular polygons would be with

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## Drag the X

In some posts on this blog I’ve already told you a little about what I research on theorem proofs (My

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## Do you know ProofWiki?

In several posts on this blog we have already talked about the role of proof for mathematicians and related fields

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## Poincaré baguettes

“As Baguettes de Poincaré” is a famous anecdote that has gone through many names and characters. The version of which

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## Crochet and the two-color theorem

The entire math community is familiar with the famous 4 Color Theorem. Its statement states that any map, drawn on

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## The Doppelganger

In the early 1910s, when aristocrats from European countries were murdered every few weeks, authorities began to fear the roots

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## Demonstrate theorems and earn chocolates

So, you do math, right? So try to demonstrate this property… The sentence above is frightening, even for trained mathematicians.

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## The Pi number in Enen Shouboutai

At the end of chapter 118 of the Enen Shouboutai manga, the characters find in the ruins of an “ancient

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## The difficulty of Taeko Okajima with fraction division: part 5

In previous posts I talked about the difficult relationship of the character Taeko Okajima with Mathematics (part 1), the role

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## The difficulty of Taeko Okajima with fraction division: part 4

In previous posts I told about the difficult relationship of the character Taeko Okajima with Mathematics (part 1), the importance

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## The difficulty of Taeko Okajima with fraction division: part 3

In previous posts I narrated a little about the relationship of the character Taeko Okajima from the 1991 anime Omoide

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## Taeko Okajima’s Difficulty with Fraction Division: Part 2

In the previous post I narrated a little about the relationship of the character Taeko Okajima with the mathematics, from

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## The difficulty of Taeko Okajima with fraction division: part 1

In the 1991 anime Omoide Poro Poro (Only Yesterday), the protagonist Taeko Okajima, at the age of 10, suffers from

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## Scientific Dissemination of Measurement Theory

When we think about Scientific Disclosure, it is important that the elements of communication are present in the process of

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## Clash against the Dollhouse Master

In Italy, in 1872 the Quirinal Palace became a place of terror, full of suicides and madmen. It was less

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## The curious circular chess

Imagine an ordinary, rectangular chess board with 64 squares. So we started a process of rounding its edges, rounding all

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## 31 recipes with 5 gelatins

Suppose you had the strange urge to eat a flavored gelatin every day of the month of May, day 1

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## Attack on the invading vampire

Early 1907, the Russian royal family celebrated the turn of the year with a traditional party and gift exchange. The

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## The influence of doctors in Sociology on the number of deaths from anticoagulants

In mathematics we call correlation a type of statistical relationship that determines how much the variation of two factors is

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## Siege of the last Beast of Gévaudan

In 1890 there was a devastating winter in the province of Gévaudan in south-central France, which led eight travelers (Alberto,

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## Vampire hunting on the Orient Express

It was summer in Budapest in 1931, when vampire Helena was preparing to return to Paris. Being a vampire requires,

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## Sensational graphics

It is scary to know that in this graph, the red column represents a population about 426% larger than the

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## My research: baby walkers for theorem demonstrations

When I say that I have a Science Blog, several people (mainly in the academic world) already assume that my

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## Prisoner’s Dilemma and the Lockdown

The Prisoner’s Dilemma is a famous mental experiment in game theory (a branch of applied mathematics that studies strategic situations

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## What is the maximum number of moves in a Giant Jenga?

You may not even know it by name, but you have certainly seen a set of little pieces of wood

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## When would the rule test work?

A video of a guy defending the Earth’s flatness circulates on the internet, based on the argument that we cannot

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## The most powerful inator

Phineas and Ferb is a design that I really like, mainly because of Dr. Heinz Doofenshmirtz’s inventions, which carry the

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## In infinite chess, your king will always be in the sights of a bishop

Think of a conventional chess except that it has no pawns and infinite horizontal and vertical dimensions. But in the

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## Triple integration in papaya

In Calculus, the integral of a function was originally created to determine the area under a curve in the Cartesian

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## Software Engineering in Age of Mythology

Age of Mythology (also known as AoM), is a mythology-based real-time strategy computer game produced by Ensemble Studios and distributed

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## D’Arby vs Jotaro

In episode 35, by JoJo No Kimyou Na Bouken: Stardust Crusaders (2014), entitled “D’Arby the Gambler – Part 2”, the

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## Facebook challenges get official UNICAMP page

People often say that they don’t like mathematics, which is a complex and difficult area, but when mathematics appears in

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## Difference in filling your car

I am 29 years old and have not taken my National driving license until today 🙂 but I was analyzing

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## That the “ENEM resolution” does not show! Question 139-ENEM2019

ENEM is an acronym for “National High School Exam”, a standardized test used in Brazil by several universities as an

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## Pizza algebra

Recently I have seen several discussions on the internet about the ratio of the diameter of a pizza offset more

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## A history of the negaTWOnist movement

Some time ago in the city of Larkinstrongner in Germany, great advances in Social Sciences began. Researchers in these areas

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## It is easier to win the lottery than to guess the next term in the number sequence [2, 3, 5, 7, 11, ?]

One thing that I have come to loathe are those so-called ‘logic challenges’ in which some values ​​are given in

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## The curious, but not supernatural, Benford’s Law

The first time I heard about this famous law, it really came as a surprise. I found it unbelievable that

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## If it works, what problem to use?

In Mathematics graduation we see many property demonstrations (whether they are called by various names as already discussed in the

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## Miracle cures and planes

There is a very curious and counterintuitive history of mathematics. It involves a team of statisticians, who during World War

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## How to pay ‘cheap’ in self-service restaurants

I’ve always hated restaurants self-service by the pound. I believed that the option flat rate was better, after all, you

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## The forgotten brothers of π

At school we learn that π is a special number, a constant obtained by the circumference of a circle divided

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## You’re weak lemma, you lack importance!

In mathematics we often hear that something is a Corollary, something else is a Lemma, that is a Proposition, there

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## Milk in cereal: beverage, broth or sauce?

This is a dilemma presented in the context of Sesame Street from the meme below: The respective scene is from

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## Calm down Pythagoras… we solve this

With the current pandemic, the need for distancing within public establishments meant that various materials proposing this safe distance were

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## Who’s afraid of the bad chart?

Have you heard the term “exponential”? Perhaps in a context more or less like this: “Such a thing has an

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## Power or accuracy?

D&d (Dungeons and Dragon) is a popular RPG system usually set in the context of a medieval fantasy world. In

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## How do you get on with facing 10 chess masters at the same time without knowing how to play?

A few days ago a meme of an 8 year old boy circulating on the internet that faced several chess

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In this post we will deal with classes and subclasses. In mathematics a class is a collection of objects that

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## Who passes x dividing without specifying a non-null domain

In those days (end of July / 2020) several memes of people circulate doing supposedly absurd things and being represented

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## The Neptune God Burger Pyramid

In episode 38 of SpongeBob, entitled “The Spatula Of Neptune”, SpongeBob removes the golden spatula from the stone (reference to

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## The topology of the planet in the 15th century view

Reminder: 15th century goes from 1401 to 1500. It is interesting when we imagine the conception of civilizations prior to

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## Chronological failure in Dr. Stone?

In the Dr. Stone anime, a supernatural phenomenon occurs with humanity in the contemporary period, causing all people to be

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## How much XP did each Misaka clone earn for the Accelerator?

If you parachuted in that post, don’t be alarmed if you don’t understand the title, let’s start the explanations. XP

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## How to contain a zombie apocalypse?

Zombie apocalypses are very common themes in films, series, anime and games. Several reasons can lead to a zombie apocalypse,

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## Kitchen jars, Cinderella and functions of a variable

Once upon a time in a very distant kitchen, a cupboard full of pots and lids.Whenever someone needed to keep

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## Demonstrate with charm

We have talked many times on this blog about demos, their importance for mathematics and everything. However, anyone who thinks

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## The Double Negative-Inator Failure

(Traduzir) Today we completed 1 year of posts, to commemorate this special date brought an analysis of my favorite cartoon,

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## Creatures of X^n heads (part 5/5)

5-part special on the creatures of X^n heads.

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## Creatures of X^n heads (part 4/5)

5-part special on the creatures of X^n heads.

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## Creatures of X^n heads (part 3/5)

5-part special on the creatures of X^n heads.

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## Creatures of X^n heads (part 2/5)

5-part special on the creatures of X^n heads.

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## Creatures of X^n heads (part 1/5)

5-part special on the creatures of X^n heads.

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## Bat-Batman or Batman-bat?

Would a man who became a bat and costume yourself like a bat be a bat-manbat or a man-batman?

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## What is a divergence meter for?

Before traveling around in time, it is recommended that you purchase a good divergence meter.

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## Scientific Divulgation of Mathematic

We have reached the hundredth post! (considering posts in Portuguese and English)

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## Lotka-Volterra equation in Madoka Magi

(Traduzir) Puella Magi Madoka Magica, simply referred to as Madoka Magi, is an anime series that aired in 2011. The

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We circled the Earth without gravity with string. How much more do we need to increase its circumference so that a cat goes through it?

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## I lost my dices, can I still play?

I wanted to play that board, but I can’t find the dice … with math you can solve this crisis!

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## To change or not to change the door?

There are 3 doors, behind one is the prize and in the goat. You chose one and the presenter opened another with a goat, do you want to change the door?

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## The last to draw is the most unlucky?

After drawing “safe” cards, there is only one left in the pile, which by elimination is the card of defeat. Is the last to draw more unlucky?

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## Some players just want to see the board burn

Apparently some players just want to see the world go up in flames, but there is a clear goal to it, and it may not be defeat …

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## What is the chance of earning resources in this round?

In a recent game, I was asked how to calculate the probability that in a play we will obtain resource at a vertex. The solution is quite simple …

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## Assuming functions for life expectancy

What is the chance of reaching the age of 110? We can estimate this based on life expectancy if we assume some functions for its behavior.

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## Königsberg bridges: destroying them is the solution

The “Seven Bridges of Königsberg” is a historically notable problem in mathematics, however its solution requires the destruction of several bridges.

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## Non-deterministic chess

What would chess look like in which the outcome of the actions was uncertain? What would change, would the usual strategies remain?

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Have you ever thought of playing Pokémon Red without capturing or buying pets, just making them up? Would it be cool, is it feasible to win like that?

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## Exodia vs Blue Eyes White Dragons

The confrontation between Yugi Muto with his Exodia and Seto Kaiba with his White Dragons with Blue Eyes in the game Duel Monsters is an epic but very improbable.

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## Digimon 2 – dark spires and transitivity

How many Snimon would need to team up to fight against a BlackWarGreymon?

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## Death Note and the pixel-soul

Death Notes present several logical inconsistencies linked mainly to digital photos.

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## A simple chess game for N players

Have you ever thought about a single classic chess game with 3, 4, 5 … 10 people? If we have enough chess boards for this, the solution is “simple”

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## How many degrees does the internal angle of a regular polygon with infinite sides?

I bet you’ve already asked yourself, how many degrees have a regular infinitone … in this post we’ll find out the answer to this question that plagues your daily life

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## How to become a master in RoShamBo?

Tired of losing at RoShamBo? Here you will learn the best way to play.

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## Unicamp fight 2019 – a mathematical analysis

A historic dispute ends with a conflicting result that leads to a tie, would a mathematical analysis lead to the same verdict?

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What is the chance of choosing 50 Jupiterians at random and 2 of them having a birthday on the same day?

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## The mystery of π = 4

There is a meme on the internet that explains how to build a “circle” with a diameter of 1, but with a perimeter of 4.

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## Earth-Prezel Hypothesis

Although some things seem to us to be indisputable truths, supposing that they are false can lead us to new ways of seeing the world.

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Lord Boros choose the “invincible” Saitama as his opponent … but that was not his greatest bad luck

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## ENEM Code – The Secret Pattern of the Test

When choosing an alternative in luck, counting the characters of the answers can be a strategy.

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## Messy Translations

Why do automatic translations mess up the text so much and how can we use it to our advantage?

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## Impossible Check!

If you like to play chess you can imagine that it is impossible to give a triple check, but could you explain why?

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## The Shadow of Angel Leliel

How is it possible for Leliel’s shadow to be a sphere while he himself is a black spot on the ground?

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## Math vs Pack Combination

You who use secret locks, be careful! Because with the basics of Combinatorial Analysis it is possible to discover the password in several models!

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## Storm Area 51

More than 2.000.000 confirmed to invade Area 51 on 20/09/2019 running in the Naruto style … this could work if they used a logarithm function.

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## Pizza Problem

Can optimization help you buy more tasty pizzas while spending less, did you feel hungry for knowledge? Come and taste …

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## Vector Product Explains Fighting Power in Dragon Ball

Did you know that Dragon Ball’s Fight Power can be explained with the Vector Product?

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## The Luck of the Man who Counted

In the last of the challenges, the Man who Counted was saved not only by his Calculus, but by his luck.

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## Irrational Holes

Did you know that with any basic operation we can start at Irrationals and end up outside of them?

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## Dark Side of Chess

Who starts at Chess has an advantage? Is this true or is it just an estimate?

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## Theorem of the Existence of Infinite Non-Funny Mathematical Jokes

Have you ever heard a dull math joke? Did you know that there are infinite of them?

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## Conditional Hydra

In Greek mythology the hydra is a monster that when it loses a false head, others are born in its place … where will the conditional probability appear?

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## Sheldon Prime

What is the best number? By the way, there’s only one correct answer. The best number is 73.

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## Terribly Harmonic

No matter how far you run in the positive Reals, this series will grow until find you.

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## The Good, the Bad and the Ugly

This post can literally save your life if you get involved in an old-west triel in which the order of shots and hit frequency is well defined!

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## Forgotten chess

Can you imagine what happened in a chess game just by looking at the current configuration of the pieces? Think carefully, as this game has less memory than it looks.

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## Retractable series

There are some series that look like retractable telescopes, we can just flatten them and get to the solution.

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