Fun with Maths – Why Seven is so Awesome

1. Most people can generally hold around seven numbers in their working memory for a short period of time (Miller’s law), which explains why our telephone numbers are mostly seven digits (excluding the country and area codes).
2. Several sleep studies have found that seven hours is the optimal amount of sleep, not eight!
3. There are seven colours in the rainbow: red, orange, yellow, green, blue, indigo, and violet.
4. The ‘Seven Seas’ (as in the idiom ‘sail the Seven Seas’) is an ancient phrase for all the world’s oceans: Arctic, North Atlantic, South Atlantic, Indian, North Pacific, South Pacific, and Southern (or Antarctic).
5. There are seven continents in the world: Africa, Europe, Asia, North America, South America, Antarctica,and Australia.
6. Seven is used 735 times in the bible (54 times in ‘Revelation’ alone)! If we include ‘sevenfold’ and ‘seventh’, the number jumps to 860!
7. And of course, seven is a prime number. 😉

Happy Seven! 😀

Sponge ME, Maths Tuition (Singapore)