India, Aug. 16 -- Are you a fan of brain teasers and love taking up new challenges? Picture this: a birthday party is in full swing, the room filled with balloons, music, and chatter. Right in the middle is a woman in a bright yellow dress, standing near a table stacked with different gifts. At first glance, it all seems happy, but her face gives away something else. She smiles lightly, but if you notice properly, there is also a small frown. The puzzle is simple: which gift upset her? And you need to figure it out in just a few seconds.

Unlike number games or tricky riddles, this one is not about solving steps. It is about quick observation. Small clues in a picture can tell you more than long explanations. Experts often say puzzles lik...