Mind Messer-from the inbox

If this doesn't mess up your mind, I don't know what will! For the thinker or Draftsman.

1. Look from left to right from top to bottom.

The rod in the middle does not exist.



2. How many, 7 or 10. Count at the top and then at the bottom.

3. Is the door open to inside or outside?

4. Round or square?

5. How many, 3 or 4?

6. Is this just one?

7. Rare construction.

8. The centre beam disappears, look from left to right.

9. 2 or 3?

And NO I don't know how they work,

 but I think I need new glasses!