“Up close, you can see that the image is actually black and white. It has coloured lines on top of it. From far away the ...

Brain teasers and optical illusion puzzles can help you prepare ... shoe within a sharp timeline of 12 seconds from the black-and-white frame to prove that you have strong and sharp eyesight.

The article describes an optical illusion where a piano is hidden among zebra stripes. To solve it, one must seek rectangular shapes and alternating black-and-white keys. The dense pattern of ...