So I found this [geek clock](https://plus.google.com/u/0/110749379267845817082/posts/CdULrL9bxiq) and I think that it's pretty cool.

![Geeky clock](https://i.stack.imgur.com/8Ru25.jpg)

I'm just wondering if it is possible to achieve the same but with another number.

So here is the problem: 

**We want to find a number $n \in \mathbb{Z}$ that will be used exactly $k \in \mathbb{N}^+$ times in any mathematical expresion to produce results in range $[1, 12]$. No rounding, is allowed, but anything fancy it's ok.** 

If you're answering with an example then use one pair per answer.

I just want to see that clock with another pair of numbers :)

**Notes for the current clock**:

`1` o'clock: using 9 only twice, but it's easy to use it 3 times with many different ways. See comments.

`5` o'clock: should be $\sqrt{9}! - \frac{9}{9} = 5$