'X' became symbolic for a kiss because in the middle ages when alot of people were illiterate and they used to sign documents with an X and then kiss it for sincerity.
255
More than 10% of the world's salt is used to de-ice American roads.
54
The most expensive license plate is the number '1', bought by an Abu Dhabi businessman - costing a staggering $14.3 million!
3
The largest diamond ever found was an astounding 3,106 carats!
99
There are more than 10 million bricks in the Empire State Building!
75
On average people fear spiders more than they do death.
447
When glass breaks, the cracks move faster than 3,000 miles per hour.
47