Step right up to a visual test that will tickle your brain! Imagine a sea of numbers, predominantly '96', but lurking within is a sneaky '98' turned upside down. This playful optical challenge invites you to sharpen your observation skills with a mere 5 seconds on the clock.source https://timesofindia.indiatimes.com/life-style/health-fitness/de-stress/test-your-eyesight-only-a-person-with-20/20-eyesight-can-spot-the-odd-number/articleshow/126108234.cms