Test your observation skills with this tricky optical illusion! Hidden among repeated numbers is the sequence '4052', and the challenge is to spot it within 8 seconds. These puzzles sharpen concentration, memory, and problem-solving skills, offering a quick mental break while improving attention to detail.source https://timesofindia.indiatimes.com/life-style/health-fitness/de-stress/optical-illusion-only-a-person-with-perfect-vision-can-find-the-4052-in-just-8-seconds/articleshow/123592364.cms