# Tagged Questions

Question on bits and pieces of mathematics that show up in popular media (TV, movies, comics, etc.)

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### Help me out with this problem. [on hold]

If the income tax is increased by 19%, the net income is reduced by 1%. The rate of the income is?
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### Did Feynman mentally compute $\sqrt[3]{1729.03}$ by linear approximation?

In the biopic infinity'' about Feynman. (11:48~15:50) Feynman compute $\sqrt[3]{1729.03}$ by a mental calculation. I guess that he use the linear approximation. That is, he observe that ...
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### explanation of topology examples from movie or other [closed]

I always like topology and geometry. But there are some examples in film and videogames that upset me... 1)Imagine an empty room in which there is a door in the middle, and if I open it I can see a ...
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### List of Interesting African Mathematics Blogs

Title says it all: looking for info on any Mathematics blogs that are either contributed to by bloggers on the African continent, or have an African continent focus (for example someone living outside ...
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### The simplest way to present a Lie algebra to a wide audience?

I would like to get suggestions from you as to the best way to present the idea and contents of Lie algebras to a wide public of people with no detailed background in maths. What wlould you explain to ...
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### Reward in a fair game?

Consider a coin toss of a biased coin, where H comes up with probability p I bet 1 dollar that the outcome of the toss will be H, win reward R if it is H, and lose the 1 dollar stake otherwise. What ...
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### Prove that $\pi>3$ using geometry

I was asked this question today in an interview. Question: Prove that $\pi>3$ using geometry. They gave me hints about drawing a unit circle and then inscribing an equilateral triangle and then ...
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### Expected number of tosses until 3 heads in a row - via Martingale method

(Quant job interviews - questions and answers - Question 3.8) For a fair coin, what is the expected number of tosses to get 3 heads in a row The answer is stated as : We gamble in such a way ...
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### Independent coin tosses , double or halve current sum

(Quant job Interviews - Questions and Answers - Joshi et al, Question 3.5) Suppose you have a fair coin. You start with 1 dollar, and if you toss a H your position doubles, if you toss a T your ...
255 views

### Determine whether a point lies inside the curve or outside a random curve using pencil and scale

Say, I am given a point and a closed curve. I don't know anything about the curve (where it is, what it is, its size etc.;say it is hidden somewhere)."I just can't see the curve but I can see the ...
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### A problem for math lovers to count the digits

Today a classmate of mine asked a question which is based on counting. Question. Find a positive integer which when multiplied up to $6$ times will give numbers having the same digits but rearranged ...
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There's a website and a companion book to it about bad physics in movies, called "Insultingly Stupid Movie Physics". Similar issues may exist about mathematics: What are the differences between ...
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### A problem V.I. Arnold solved as a primary school student

According to a 1995 interview that Vladimir I. Arnold gave to the Notices of the AMS, his primary school teacher I.V. Morozkin gave in 1949 (when Arnold was 12 years old) to a Soviet classroom, most ...
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### What is the best strategy for Cookie-Clicker-esque games?

Today, I stumbled across the game Cookie Clicker, which I recommend you avoid until you have at least a few hours of time to waste. The basic idea behind the game is this: You have a large stash of ...
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### Is there something to the “let $\varepsilon < 0$” joke that I'm missing?

Sorry if this is the wrong place to ask this, but I feel it's a question of vital importance to the future of math education. I hear this listed as a "math joke" all the time and I've never got it. ...
304 views

### New mathematical results in fiction work

On the surreal numbers page on Wikipedia it says: They were introduced in Donald Knuth's 1974 book Surreal Numbers: How Two Ex-Students Turned on to Pure Mathematics and Found Total Happiness. ...
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### Statistics Workshop for High School Students

We are going to hold an introductory workshop about the statistics. The participants will be students who have just finished their 8th or 9th grade. The workshop consists of 10 two-hour sessions. The ...
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### What is the solution to Nash's problem presented in “A Beautiful Mind”?

I was watching the said movie the other night, and I started thinking about the equation posed by Nash in the movie. More specifically, the one he said would take some students a lifetime to solve ...
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### Explaining what real math is to a high school student

I think, after reading through some of the questions here and their answers, that there are many people here who share my opinion on high school mathematics that it's quite different from "real ...
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### Monty Hall Application

Driver A comes to a 3 way path junction but is not sure which one to take. Just as he decides to take path 1, a cyclist came by and told driver A all he knows is that he is going on path 3 which would ...