Mathspp Blog

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This simple problem is an example of a very interesting phenomenon: if you have a large enough "universe" to consider, even randomly picked parts exhibit structured properties.

Let's prove that, if a set has size \(n\), then that same set has exactly \(2^n\) subsets.

The 24 Game is a well-known maths game that is played with kids in school to help them master the four basic arithmetic operations. In this blog post we will study the game in depth.

Today we are visiting a specific instance of a well-known basic mathematics game, the 24 Game. The "24 Game" is usually played with younger students because it helps them develop skills related to the basic arithmetic operations.

Take out a piece of paper and a pencil, I am going to ask you to write some letters in your sheet of paper and then I am going to challenge you to fold the sheet of paper... with a twist!

\(n\) mathematicians with numbered party hats gather around in a circle... It is a matter of life or death!

There's 100 drawers and 100 shuffled balls. Can you find the one I choose?

I mixed up my hamburgers while cooking. Can you help me out?

Can you cover all of the rational numbers in [0, 1] with tiny intervals?

Split the numbers 0, 1, ..., 15 into two sets with sum interesting properties!

Can you find out how many carriages this circular train has?

How can 2018 monks find eternal peace?

How often do the hands of a clock overlap?

In high school I had a colleague that had his birthday on the same day as I did. What a coincidence, right? Right..?

How can 4 friends guess their own hat colours?

How can a greedy pirate captain keep his treasure to himself?

Given some paper squares, can you slice them and then glue them back together to form a single square?

Is it true that every integer you can think of has a multiple written out only with \(0\)s and \(1\)s?

I find the problem in this post rather fun to think about because it is a problem about a game that can actually be played between two players.

In this post we will talk about three different, all very common, ways of writing proofs: proofs by construction, by contrapositive and by contradiction.