Test your vision with a quick optical illusion. Find a hidden number 140 among many 150s in just eight seconds. This challenge sharpens focus and attention to detail. Success means you have excellent visual processing skills. Practice these puzzles to improve your reaction speed and ability to spot subtle differences. It is a fun way to boost cognitive agility.source https://timesofindia.indiatimes.com/life-style/health-fitness/de-stress/only-people-with-eagle-eyes-can-spot-the-number-140-in-under-8-seconds/articleshow/125386542.cms