Math & Numbers Facts for Kids

Ancient Egyptians did multiplication by doubling and adding — a clever system that's similar to how computers calculate today.

In 1736, mathematician Euler proved it was impossible to walk through the city of Königsberg crossing each of its seven bridges exactly once.

Here's a cool trick: 8% of 25 is the same as 25% of 8. You can always swap the numbers!

As you add more sides to a regular polygon, it looks more and more like a circle — a circle is like a polygon with infinite sides.

Many mathematicians consider Euler's identity (e^iπ + 1 = 0) the most beautiful equation ever because it links five fundamental numbers.

You only need four colours to colour any map so that no two neighbouring regions share the same colour.

On a standard die, opposite sides always add up to 7: the 1 is across from 6, 2 across from 5, and 3 across from 4.

The word "algebra" comes from the Arabic word "al-jabr," from a 9th-century math book by the scholar al-Khwarizmi.

People in different countries count on their fingers differently — in Germany, counting starts with the thumb, not the index finger.

The Sierpinski triangle is a fractal made by cutting out smaller and smaller triangles — it has infinite detail but zero area.