There’s no need to resort to the dusty old library in order to find them.
These fifteen riddles will relieve your boredom and give you a spring in your step.
What takes breath, but doesn’t have lungs?
Which was caused by the ____ of a dinosaur?
Which is more like a whale than a horse?
What’s dark when it’s wet, but light when dry?
What grows to twice its size every day and then shrinks back to half the size at night?
Five doors lock with five keys. Each key opens one door.
The doors are differently colored, and the keys are differently shaped.
You have to get from one side of the corridor to the other quickly – but there’s a catch.
Nobody knows which key goes with which door, and only one key opens each door.
Three ships sail across the sea and meet in a storm.
The first ship is completely wrecked, the second is half wrecked, and the third ship is badly damaged but still afloat.
If you were one of the captains of each ship, which would you choose?
Would you take your most damaged ship into harbor? Choose your answer below.
A large group of people is assembled in a room with a piano.
One person at a time plays a series of notes on the piano by putting their hands on corresponding keys for each note.
However, each note is played only once.
After the last note is played, each person in the room will be required to name the song that was just played.
How many people must you gather in order to ensure that they can always identify the song?
Ten men take a test. The first man receives 100% on the test; a second man receives 70%;
a third man receives 55%; and so on, until the last man only gets 20%. If you were one of these men, which score would you have received?
A farmer has five cows. One of them is black, one of them is white, and three of them are brown.
How can you tell which is the black cow?
You have a herd of 100 cows. Each morning, you take one cow from the herd, and then at night you bring that same cow back.
At the beginning of each day, exactly half of your cows will be black and the other half will be white.
After a week, how many white cows will have been added to your herd?
You are given 2 identical keys to open two different locked doors. Each key opens only one door,
and each door is locked with a deadbolt that must be turned in order for the door to unlock.
Your task is as follows: You must unlock both doors by using only these two keys within one minute.
The task is made more difficult: the lock on one door will require a 45 degree turn,
and the lock on the other door will require a 90 degree turn. How can you do this?
You have five locks, each with three padlocks. Together, your locks must be opened within one minute.
Your first lock has five padlocks and four of them have been stolen –
so you only have enough keys to open two of your locks. You must open all five locks within one minute using just four keys. How can you do this?
After first reading it twice through, I still don’t know if the author intended “three-headed” to mean literally or figuratively.
In a large forest, there are ten different trails.
There are two sets of five trails named the East Trails and the West Trails.
The East Trails all run North-South, and the West Trails all run East-West.
The remaining trail is North-South but doesn’t intersect any of the other ten trails.
If you were an explorer left completely lost in this forest, how would you find your way out?
Your task is to connect seven houses to seven cities with seven wires via seven switches on a control box with only three operations (push/pull/turn).
There are 80 wires, 80 switches, and 84 cities in the map. if albert’s son is my son’s father
You can choose either to connect four houses to four cities or to connect six houses to ten cities.
However, you must first carefully observe that these two choices are not mathematically related.
For example, if you choose to connect four houses to four cities and then three more cities,
you cannot do it again afterwards by choosing another combination of the same number of houses and the same number of cities.
If you had made a mistake in your choice, how would you know if it is because there are just three operations or five?
Note: The answer will be different for each option.