I'll also post a reasoning puzzle.
During a stunt skydiving show, 50 performers jumped from the sky to form a beautiful pattern, but people noticed that the pattern seemed to be missing something... Soon, it was discovered that someone had fallen from the sky and was stabbed to death upon hitting the ground.\ Shortly after, the police arrived at the scene and found a large oil stain on the strap of the deceased's parachute backpack. The backpack had been tampered with so that a flying knife would stab a person in the heart when it was opened. The police immediately focused on the organizer of the event, because he had been in charge of the backpacks before the jump, which meant he was the most likely person to have tampered with them. However, the organizer said: 'I didn't kill anyone. Even before they jumped, I placed the backpack straps facing them by the window. All these backpacks are exactly the same, and each is taken randomly. If I were the killer, how could I ensure which person would get the backpack with the flying knife?'\ The police smiled: 'Stop making excuses, you are the murderer!'\ Question: How did the organizer control which person got the backpack with the device?\ The answer will be revealed tomorrow.
Replies (17)
Use some things to hold back the deceased, so he takes the last one, because nobody likes the one with oil.
I speculate that the deceased may have been a professional skydiver, and his occupation might have been a mechanic, so his backpack was once placed in the repair shop and accidentally got stained with oil.
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