Triskaidekaphobia refers to the fear of the number 13. In Italy, the unlucky number is considered to be the number 17.

There are over 500 types of cheese produced in France. In New Zealand, there are 10 times as many sheep as there are people.

Cigarette making machines produce 10 000 cigarettes per minute. Immanuel Kant had been writing the Critique of Pure Reason for 10 years.