FILE No.145Unsolved
At 2:15 p.m. on an early-dismissal day, two students talking in a classroom heard a "click." Looking around, they found that the classroom door was locked. No one was there.
The window is on the third floor, so they cannot jump. The teacher is in a meeting and cannot be called. The door's lock was the type found in public restrooms, a spring latch bolt sticking out of the edge of the door. There is a gap between the door and the wall (frame) wide enough for a thin ruler, and the classroom has a 30 cm ruler.
What did the two use to get out of the classroom?
If you get stuck, open the hints one at a time, in order.
What type of lock is it?
Is there anything thin and hard in the classroom?
What can you do through the gap?
What did the two use to get out of the classroom?
Choose the answer closest to the truth.
Slid a ruler into the gap between door and wall and pushed the latch back
The answer is "Slid a ruler into the gap between door and wall and pushed the latch back."
A latch-type lock can be opened by sliding a thin plate into the gap between the door and the frame and pushing the latch back, even from the inside. The ruler in the classroom can be used.
The window is on the third floor, which is dangerous. The teacher is in a meeting, so calls for help will not reach him. Nothing is written about breaking the door.
Because you think you can't get out without a key.
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