Question: Given to me, by a friend:

> 
> How would you make 20, using two threes?
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> 
> 

* You may use any basic operation. And others, such as square roots (the symbol), factorials, etc. Any operation is allowed.
* Just two threes, though. You can't raise a three to any digit other than three, etc.

Any out of the box, non-mathematical solutions are encouraged.

PS- Wow! That's an amazing number of responses! Quite a community, here.

EDIT: @CameronWhite and @Yly have provided, perhaps the most elegant answers. And basis your votes, I'm going ahead to mark @Cameron's answer as accepted. No issues, I hope. Although, I did think @KeyboardWielder's answer was rather crafty. And @dcyfj... Well, that would have taken some time. Awesome answer. This really isn't an edit, is this?

EDIT: Perhaps I should have specified the level of out-of-the boxness allowed. Forgive my mistake. This was, my first post, and I was surprised by the number of answers. Thanks for taking the time.

Answer: 
Since the puzzle oddly and specifically mentions the **symbol** for the square root, I used this:

> 
>  [![enter image description here](https://i.stack.imgur.com/hYj9q.png)](https://i.stack.imgur.com/hYj9q.png)
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> 
> 

but rotated and reflected it giving:

> 
>  [![enter image description here](https://i.stack.imgur.com/Ph3Mg.png)](https://i.stack.imgur.com/Ph3Mg.png)
> 
> 
>
> 
> How would you get 20, using two threes?
>    
>   
> 
>  Any out of the box, non-mathematical solutions are accepted.
> 
> 
> 

How about an
“[in the box](http://www.urbandictionary.com/define.php?term=in%20the%20box&defid=6763204)” solution?

You'd be lucky to **not** get 20, following the explicit formula published in
[U.S.[A.] Code, Title 18](https://www.gpo.gov/fdsys/pkg/USCODE-2011-title18/html/USCODE-2011-title18.htm):

> 
>  **§471.** Obligations or securities of United States.  
>  Whoever, with intent to defraud, falsely makes, forges, **counterfeits**,
>  or alters any obligation or other security of the United States,
>  shall be fined under this title or imprisoned not more than
>  **20** years, or both.
> 
> 
> 

Naturally, the threes are ...

> 
>  ... USA [three-dollar bills](https://en.wikipedia.org/wiki/Fake_denominations_of_United_States_currency) ...
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> 
> 

This formula can be generalized
for any positive number of threes, of course,
but may not translate exactly to all international units of measure.