Puzzle with hidden spider challenges participants to spot it in under 10 seconds, aiming to improve brain function.

Brainteasers can sharpen cognitive abilities and delay dementia. A recent puzzle featuring a carpet with a hidden spider challenges users to spot the critter in under 10 seconds. The image, shared on Reddit, has left many puzzled, with some jokingly suggesting all the spiders are the answer. The challenge aims to test participants' eagle eye skills and improve brain function.