You enter a mysterious chamber with three doors. Door 1 leads to an active volcano. Door 2 leads to a room filled with venomous snakes. Door 3 leads to a solar flare simulator. Which door is the safest to open?
Door 2.
Venomous snakes are dangerous, but active volcanoes and solar flare simulators involve extreme heat and radiation that are instantly lethal or destructive on a massive scale. Wait, all are deadly. Let's make a standard logic door riddle: Door 1 has a trap that kills instantly, Door 2 has a hungry lion that hasn't eaten in 3 years, Door 3 has a roaring fire.
About this riddle
Logic riddles give you a few facts and ask what must be true. List what you know, cross out what cannot be, and see what is left.
Difficulty: Easy. More like this: Logic riddles with answers or try Einstein's Logic Grid for a different kind of puzzle.
More logic riddles
Feed me and I live, but give me a drink and I will die. What am I?
Three brothers—Tom, Dick, and Harry—each wear a uniquely colored hat: red, blue, or green. Tom is not wearing the red hat. The man in the blue hat is older than Harry. Dick is the youngest and does not wear the green hat. What color hat does Harry wear?
A merchant wants to weigh exactly 4 pounds of sugar using a 7-pound weight, a 9-pound weight, and a two-pan balance scale. What is the minimum number of weighings required?
A traveler comes to a river with a 100 kg weight limit for the small raft. A father weighs 100 kg, and his two sons each weigh 50 kg. How can all three cross to the other side?
In a secure facility, a guard checks security logs every time someone enters or leaves. Alice enters at 8:00 AM, Bob leaves at 9:00 AM, Charlie enters at 10:00 AM, and Diana leaves at 11:00 AM. No one else enters or leaves. If the building started completely empty at midnight, how many people are inside the facility at 12:00 PM?
If you multiply me by any other number, the result is always the same. If you add me to any number, that number remains unchanged. What number am I?