New Delhi, Aug. 30 -- Brain teasers never really go out of style. They push the brain in ways that feel playful but also demanding, giving that quick rush when the answer finally clicks. The latest one making rounds online drops you right into the chaos of a Formula 1 race scene. Hidden somewhere in the illustration are three flags - yellow, red, and chequered. The challenge sounds simple enough, but there is a catch. You only get 13 seconds to track them all down.

The artwork is packed with distractions - cars, trackside details, and lots of color - so spotting the flags isn't as easy as it sounds. The puzzle has been blended in such a way that most people stare right past the answer. That is why it has quickly gone viral.

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