A
Three boxes are labeled GOLD, SILVER, EMPTY.
One has gold, one silver, and one is empty.
Every label is wrong.
You may open only ONE box.
Which box should you open?
✅ EMPTY
A clock takes 6 seconds to strike 7 times.
How long will it take to strike 12 times?
✅ Answer: 11 seconds
The detective finds this written beside a safe:
2 → 6
3 → 12
4 → 20
5 → ?
What number should replace ?
✅ Answer: 30
A safe has a 3-digit code. All digits are different.
682 → One digit is correct and in the right place.
614 → One digit is correct but in the wrong place.
206 → Two digits are correct but both in the wrong places.
738 → No digit is correct.
780 → One digit is correct but in the wrong place.
What is the code?
✅ Answer: 042
A man is found hanging in a locked room.
There is no furniture he could have stood on.
The ceiling is too high to reach from the floor.
Police find only a large puddle of water beneath him.
What did he stand on?
✅ Answer: A block of ice.
Ten candles are burning in a room.
A strong wind blows through the window and puts out 3 candles.
The window is then closed.
The other candles continue burning until they completely melt.
How many candles remain the next morning?
✅ Answer: 3
You have 8 identical-looking coins.
Exactly one is heavier.
You have a balance scale.
What is the minimum number of weighings needed to guarantee finding it?
✅ Answer: 2 weighings
A thief is hiding on one floor from 1–5.
He is above Floor 2.
He is not on Floor 5.
There is exactly one floor between him and Floor 2.
Which floor is he on?
✅ Answer: Floor 4
A prisoner walks:
3 km north → 3 km east → 3 km south
He ends exactly 3 km east of where he started.
How far is he from the starting point?
✅ Answer: 3 km
Three switches are outside a locked room.
Only one controls the bulb inside.
You may use the switches however you want,
but you may enter the room only once.
How do you identify the correct switch?
✅ Answer: Use light + heat.
A detective finds:
O T T F F S S ? N T
What letter replaces ?
✅ Answer: E
An analog clock shows 3:20.
A detective sees its reflection in a mirror.
What time does the reflection appear to show?
✅ Answer: 8:40
A detective sees six parking spaces:
16 | 06 | 68 | 88 | ? | 98
What number is under the parked car?
✅ Answer: 87
You have 4 bottles. Exactly one contains poison.
You have test strips that show positive after one hour.
You may put drops from several bottles on the same strip.
What is the minimum number of strips needed to identify the bottle in ONE round?
✅ Answer: 2 strips
A detective must choose one of three rooms:
Room A is filled with fire.
Room B contains armed guards who attack anyone entering.
Room C contains lions that have not eaten for three years.
Which room is safest?
✅ Answer: Room C.