Author J K Rowling wrote the final chapter of the last Harry Potter book in "something like 1990", seven years before the release of the first book.
7
80% of millionaires drive used cars.
68
There are 2,500,000 rivets in the Eiffel Tower.
98
Wearing yellow makes you look bigger on camera; green, smaller.
222
The 1 yen coin can be used as a weight, because it weighs exactly one gram. Also, it can float on water.
19
The "Cobra Effect" is where a solution for a problem actually makes the problem worse.
21
The 409 escalators in the London subway cover a distance every week which is approximately equivalent to several trips around the globe!
94