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

What is the box suggesting?

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

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

What is the logic?

The solution is the

first option (123456789)

from the list above.

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

What is the box suggesting?

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

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

What is the logic?

The solution is the

first option (123456789)

from the list above.