Idioms with numbers:

Of so many idioms I only know just a few.

1. at the eleventh hour
2. playing second fiddle to sb.
3. talk nineteen to the dozen: talk very fast
4. in two minds about
5. on second thoughts
6. have forty winks: have a short sleep during the day
7. second to none
8. sixth sense
9. second nature
10. 99 times out of a hundred
11. love at first sight
12. back to square one: back to the beginning (sports)
13. come off second best: to be beaten in a competition or an argument
14. know the first thing about sth.
15. one up on sb.


Others:
Practical Joke: a joke which makes someone seem foolish and involves a physical action rather than words