Mathematics Stack Exchange
Mathematics Stack Exchange

Questions tagged [recreational-mathematics]

Mathematics done just for fun, often disjoint from typical school mathematics curriculum. Also see the [puzzle] and [contest-math] tags.

Recreational mathematics is a general term for mathematical problems studied for the sake of pure intellectual curiosity, or just for the enjoyment of thinking about mathematics, without necessarily having any practical application or expectation of deep theoretical results.

Recreational mathematics problems are often easy to understand even for people without an extensive mathematical education, even if the theory they lead to may turn out to be surprisingly deep. Thus, recreational mathematics can serve to attract the curiosity of non-mathematicians and to inspire them to develop their mathematical skills further.

Many typical recreational mathematics problems fall into the fields of discrete mathematics (combinatorics, elementary number theory, etc.), probability theory and geometry. Important contributors to recreational mathematics are Sam Loyd and Martin Gardner.

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Challenge - "Highscore" output equation

I need an equation capable of processing 2 inputs to make one output that is either = to input 1 or 2. This is how it works. Since it is working with scores and such, Input1 will be "Last Score", and Input2 will be "Current High Score". This…
CocoaMix86
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Fun math riddle

In his will , a farmer left 17 horses to his 3 sons with the following instructions. 1) The eldest son is to get half of the total horses. 2) The middle son is to get one third of the total horses. 3) The yongest son is to get one ninth of the total…
neofoxmulder
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How does Pi fit on the real number line?

Since the decimal expansion of Pi is infinite and unpredictable, the number just to its left and just to its right would have to conform to Pi’s ever changing value if we are to suppose there are no gaps between successive numbers. If that is so,…
Jandon Gropp
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How do I calculate the price of 50g of a product, if the total grams of the product cost a certain amount

I am looking for a formula that can calculate cost per 50g. e.g. How do I calculate the price of 50g of Pepper, if 300g costs 132? or How do I calculate the price of 50g of Salt, if 1000g costs 100? What standard formula could I use?
RRB
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The hands of a clock are observed continuously from 12:45 pm onwards. They will be observed to point in the same direction some time between

The hands of a clock are observed continuously from 12:45 pm onwards. They will be observed to point in the same direction some time between A).1:03 pm and 1:04 pm B).1:04 pm and 1:05 pm C).1:05 pm to 1:06 pm D).1:06 pm to 1:07 pm I don't understand…
Felix
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If you invest in an account that earns 4.5% interest compounded continuously..

If you invest in an account that earns 4.5% interest compounded continuously, how long will it take to triple your money assumig you leave it in the account? Just another fun question from a website :D
ewrwr
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A number greater than one billion, with deep mathematical meaning.

The most famous large number that have appeared in mathematical papers is the Graham number. However, the Graham number is an upper bound, and its largeness has no meaning. I would like to know about huge numbers that have deep mathematical…
Kitamado
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Say, hypothetically, there were 4 seconds in 1 minute instead of 60 seconds. How many seconds would 24 hours (1 day) be?

Let 1 minute = 4 seconds. Let 1 hour = 60 minutes. Let 1 day = 24 Hours. How many seconds would be in 1 day?
Samuel Antonov
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The answer is as expected, but this is not proportionality.

A man leaves office everyday at 5 p.m. His driver leaves home everyday at such a time that he can pick up his master from the office at 5 p.m. The driver drives at a constant speed. Now one day, the man left office at 4.40 p.m. and started walking…
Fawkes4494d3
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Problem About Equality: Is 2=1?

As we know that $$\frac{1}{0} = ∞ \implies \frac{1}{∞} = 0 \implies 1 = 0.∞$$ Now let $x=0$ and $y=0$ then $$x+y=0 \implies \frac{x+y}{1}=0 \implies \frac{x+y}{0}=1$$ and $x+y=0$ so $$\frac{0}{0}=1$$ Similarly, as $\frac{2}{2}=1$ and…
Syed Muhammad Asad
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Base representation problem

This is a very simple problem, but the solution for it does not make too much sense to me, what I believe should be the solution is that since we want to represent it in terms of (b-1) we should have it so it is (b-1)(b-2) + 2*(b-1)^0 yet for some…
Kevin Perez
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Is this a mathematical statement - "$x^2 + 1 = 0$ has 12 real roots"?

Is this a mathematical statement? $x^2 + 1 = 0$ has $12$ real roots can anyone tell me is it a mathematical statement or not
Nitin Kumar
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