Early article(s) : 8 Super Fun Facts about Maths
1. A pizza that has radius “z” and height “a” has volume Pi × z × z × a.
Because the area of a circle is Pi multiplied by the radius squared (which can be written out as Pi × z × z). Then you multiply by the height to get the total volume.
2. The word hundred is derived from the word “hundrath”, which actually means 120 and not 100.
3. In a room of just 23 people there’s a 50% chance that two people have the same birthday.
It’s called the Birthday Problem. In a room of 75 there’s a 99% chance of two people matching.
4. 111,111,111 × 111,111,111 = 12,345,678,987,654,321.
It also works for smaller numbers: 111 × 111 = 12321.
5. Zero is the only number that can’t be represented in Roman numerals.