The best riddles. Anywhere.

## Medium Riddles

These medium riddles are not too hard and not too easy, and are a great way to increase your riddle-solving prowess.

### Reasoning

You have two lengths of rope. Each rope has the property that if you light it on fire at one end, ...
You are standing in a pitch-dark room. A friend walks up and hands you a normal deck of 52 cards. ...
Two trains are traveling toward each other on the same track, each at 60 miles per hour. When they ...
You are standing in a house in the middle of the countryside. There is a small hole in one of the ...
There are 3 switches outside of a room, all in the 'off' setting. One of them controls a lightbulb ...
Your friend pulls out a perfectly circular table and a sack of quarters, and proposes a game. ...
You have twelve balls, identical in every way except that one of them weighs slightly less or more ...
You have just purchased a small company called Company X. Company X has N employees, and everyone ...
You have two jugs, one that holds exactly 3 gallons, and one that holds exactly 5 gallons. Using ...
You are walking down a path when you come to two doors. Opening one of the doors will lead you to a ...
Three people check into a hotel room. The bill is \$30 so they each pay \$10. After they go to the ...
Four people come to an old bridge in the middle of the night. The bridge is rickety and can only ...
A man needs to send important documents to his friend across the country. He buys a suitcase to put ...
A man comes to a small hotel where he wishes to stay for 7 nights. He reaches into his pockets and ...
At a dinner party, many of the guests exchange greetings by shaking hands with each other while ...
A king has 100 identical servants, each with a different rank between 1 and 100. At the end of each ...
You have two sand hourglasses, one that measures exactly 4 minutes and one that measures exactly 7 ...
This is a harder version of the famous riddle, A Liar and a Truth Teller. You should try that ...
You have 25 horses. When they race, each horse runs at a different, constant pace. A horse will ...
A guard is stationed at the entrance to a bridge. He is tasked to shoot anyone who tries to cross ...
There are 100 ants on a board that is 1 meter long, each facing either left or right and walking at ...
A monk leaves at sunrise and walks on a path from the front door of his monastery to the top of a ...
Bill and Stacie are delighted when their new baby, Patrick, is born on February 29th, 2008. They ...
A frog is at the bottom of a well. It is a 30 foot climb to get out. Each morning, the frog jumps 3 ...
You are visiting NYC when a man approaches you. "Not counting bald people, I bet a hundred bucks ...
A deliveryman comes to a house to drop off a package. He asks the woman who lives there how many ...
100 men are in a room, each wearing either a white or black hat. Nobody knows the color of his own ...

### Probability

You are on a gameshow and the host shows you three doors. Behind one door is a suitcase with \$1 ...
You have a basket of infinite size (meaning it can hold an infinite number of objects). You also ...
What is the least number of people that need to be in a room such that there is greater than a 50% ...
Your enemy challenges you to play Russian Roulette with a 6-cylinder pistol (meaning it has room ...
Your friend shows you two jars, one with 100 red marbles in it, the other with 100 blue marbles in ...

### Logic

Einstein said that only 2% of the world could solve this problem. There are 5 houses in 5 different ...

### Lateral Thinking

A girl lives in a house with her parents. There is a cellar door in the house, and her parents warn ...
You overhear a man talking to a clerk in a hardware store. The clerk says "One will cost you 12 ...
What belongs to you, but other people use it more than you do?
A man who lives in Middletown has two girlfriends, one in Northtown and one in Southtown. Trains ...
A truck stops at a weigh station at the entrance to a bridge and is shown to weigh exactly 2000 ...
Romeo and Juliet are found dead in a small puddle of water, surrounded by broken glass. The ...
A man is found dead in the desert. He is wearing only his underwear. Half of a straw is found ...
A man eats dinner, goes up to his bedroom, turns off the lights, and goes to sleep. In the morning, ...
A man lives on the 44th floor of his building. On rainy days, when he gets home from work, he takes ...
A poor miller living with his daughter comes onto hard times and is not able to pay his rent. His ...
Pete is a worker on a large ship with hundreds of other men. He is constantly making mistakes, ...

### Language

What gets wetter as it dries?
It is greater than god, more evil than the devil, the poor have it, the rich need it, and if you ...

### Math

There are 1 million closed school lockers in a row, labeled 1 through 1,000,000. You first go ...
Using only and all the numbers 3, 3, 7, 7, along with the arithmetic operations +,-,*, and /, can ...
Andy, Barry, and Carl race each other in a 100-meter dash. They each run at a constant speed ...
Five coworkers want to know what the average of all their salaries is, but refuse to reveal ANY ...
The King of a small country invites 1000 senators to his annual party. As gifts, each senator ...

### Spatial

A swan sits at the center of a perfectly circular lake. At an edge of the lake stands a ravenous ...
You are somewhere on Earth. You walk due south 1 mile, then due east 1 mile, then due north 1 mile. ...
You can easily "tile" an 8x8 chessboard with 32 2x1 tiles, meaning that you can place these 32 ...
Two twin brothers share the same birthday. Their father gets them a perfectly rectangular birthday ...

### Programming

Two words are anagrams if and only if they contain the exact same letters with the exact same ...
Two robots are placed at different points on a straight line of infinite length. When they are ...