This Challenge tests your visual acuity and takes you on a fascinating, mind-bending adventure. Prepare to play.
This intriguing optical illusion will test your focus and observation.
Challenge: “Optical illusion: try to spot the odd number in 10 seconds”.
Never fear the challenge—solving the puzzle is more fun than beating the time restriction.
You'll see a graphic with numbers, possibly ending in six, but wait!
A secret number has been carefully hidden to look like the others.
Here comes your eagle's eye. Look at the image carefully. Scan carefully.