7. ‘Four’ is the only number in the English language that is spelt with the same number of letters as the number itself.

8. Every odd number has an “e” in it.

9. The reason Americans call mathematics “math”, is because they argue that “mathematics” functions as a singular noun so ‘math’ should be singular too.

10. Markings on animal bones indicate that humans have been doing maths since around 30,000BC.

11. “Eleven plus two” is an anagram of “twelve plus one” which is pretty fitting as the answer to both equations is 13.

12. Also, there are 13 letters in both “eleven plus two” and “twelve plus one”