A calm morning turns serious when a car leaves the road and hits a tree. The driver says he braked instantly; his wife insists he was going too fast. With short skid marks and conflicting stories, investigators turn to the maths. Using braking-distance and reaction-time models, can you uncover what really happened in the final seconds before impact?

A daring midnight heist has left a historic mansion stripped of its most valuable treasures—a priceless Renaissance painting and a collection of rare jewels. The thief left behind no forced entry, no broken locks, and, most mysteriously, no triggered alarms. How did they bypass the high-tech security system without a trace?

A shipment of premium Colombian coffee has arrived at the Port of Marseille. It looks legitimate — until a sniffer dog flags one of the crates. Inside? Hollow coffee beans, expertly filled with narcotic powder and sealed to avoid detection. The importer claims ignorance, arguing that if anything had been altered, the mass inspections would have picked it up.