I found a [Very Difficult IQ Test][2] on web.  
One of its questions is: 

> What is the box suggesting?
>
>![enter image description here][1]

I have seen the answer but there was no clues for the logic behind that.


> 1. 123456789<br>
> 2. 176h54308<br>
> 3. 627456934<br>
> 4. 126485704<br>
> 5. 673258719<br>


**What is the logic?**

The solution is the 
>! first option (**123456789**)<br>

from the list above.


  [1]: https://i.sstatic.net/zhnZu.jpg
  [2]: http://www.allthetests.com/quiz18/quiz/1139060031/Very-Difficult-IQ-Test