It sounds like you’re describing a puzzle where the task is to identify left-handers in a group of people and a squirrel, based on their actions. Each person’s handedness is shown through the work they perform.
The chef uses a knife with his right hand, the computer user uses both hands, the broom sweeper also uses both hands, the photographer presses buttons with her right hand, and the squirrel eats with both hands.
However, the waitress, while carrying the tray with her right hand, served coffee with her left hand. The conclusion drawn is that the left-handed person in this puzzle is the waitress. It has been suggested that left-handed people may feel more comfortable holding the tray with their right hand while using their left hand to serve.
This type of puzzle is fun to test observation skills and intelligence, requiring a bit of lateral thinking within a certain time frame. While fun, it should be noted that official IQ tests provide a more accurate measure of intelligence than these fun mental challenges.