1. OPTICAL ILLUSIONS

2. Are the squares above marked A & B the same color or different?

3. Proof: They are the same. The shadow causes an illusion of white.

4. Which is darker?

5. Proof

6. Count the black dots. Do they keep moving?

7. Are the purple lines parallel or curved?

8. Can you believe that all the gray lines above are perfectly parallel?

9. Can you believe that all the red lines make perfectly straight lines?

10. Stare at the blue circles and move your head back and forth from the screen. Do the outer circles move?

11. Can you believe that this is a picture and not an animation? To check, just focus on one leaf for 5 seconds.

15. Which line is longer? They are actually the same size.

17. How many legs does the elephant have above?

18. Do you see a spiral or circles?

19. Which way are the cubes facing? Up or down?

20. Are the balls inside or on the shelf?

21. Who is down and who is up?

22. Do you see one woman or two women looking at the candle?

23. What do you see on the left? What do you see on the right?

24. What do you see? A sax player or a human face?

25. Skull or Young Lady?

26. Birds or Lady?

27. What word do you see?

28. Which soldier is the tallest?

29. Stare at the centre of the grid, do the edges start to repair themselves

30. What do you see?

32. Rabbit or Duck?

33. Stare at the light bulb

34. What do you see?

35. Stare at the cross in the centre

36. What do you see?

37. Who do you see?

38. OPTICAL ILLUSIONS