Hard Riddles

Hard Adults & Lateral-Thinking

A prisoner is told: "If you tell the truth, I will shoot you; if you tell a lie, I will stab you." What should...

Hard Adults & Lateral-Thinking

What can you feed to make it live, but give it a drink and it will die?

Hard Adults & Lateral-Thinking

What type of room has no windows or doors?

Hard Adults & Lateral-Thinking

If you dropped me from a tall building, I would be fine. If you put me in the water, I would die.

Hard Adults & Lateral-Thinking

In the first stages of my life, I am taller than I will be in my last stages.

Hard Adults & Lateral-Thinking

Who buys this but has no use for it, makes it but doesn�t need it, and uses it but can�t feel it or see it?

Hard Adults & Lateral-Thinking

What has a corkscrew on one side and a power socket on the other?

Hard Adults & Lateral-Thinking

There are two of us, and we are sisters. We are on different sides of a road, but we are unable to view each o...

Hard Adults & Lateral-Thinking

What has both wheels and flies but is not an aircraft?

Hard Adults & Lateral-Thinking

What is one time that a man can have an empty coat pocket, but have something in it at the same time?

Hard Math and Logic

Payoff 2n (St. Petersburg). Charge to play?

Hard Math and Logic

Probability to be the last to try pitcher?

Hard Math and Logic

Surprise test impossible logic?

Hard Math and Logic

Sphere or Torus using rocks?

Hard Math and Logic

Hourglass weigh more falling or at rest?

Hard Math and Logic

1 poisoned bottle in 1000. Prisoners needed?

Hard Math and Logic

P1 (4 of kind), P2 (3 of kind). Worst possible hand?

Hard Math and Logic

Break stick at 2 random points. Triangle prob?

Hard Math and Logic

Camel 3000 bananas, 1k km. Max reach?

Hard Math and Logic

Spheres with 6cm holes. Which has more volume?

Hard Math and Logic

Irrational number ^ irrational power = rational?

Hard Math and Logic

1st sits random. Last gets assigned seat prob?

Hard Math and Logic

100 cheating husbands. Execution day?

Hard Math and Logic

Truth 3/4 times. Says 6 on a die. Prob it's a 6?

Showing 481 to 504 of 569 results

A prisoner is told: "If you tell the truth, I will shoot you; if you tell a lie, I will stab you." What should...

What can you feed to make it live, but give it a drink and it will die?

What type of room has no windows or doors?

If you dropped me from a tall building, I would be fine. If you put me in the water, I would die.

In the first stages of my life, I am taller than I will be in my last stages.

Who buys this but has no use for it, makes it but doesn�t need it, and uses it but can�t feel it or see it?

What has a corkscrew on one side and a power socket on the other?

There are two of us, and we are sisters. We are on different sides of a road, but we are unable to view each o...

What has both wheels and flies but is not an aircraft?

What is one time that a man can have an empty coat pocket, but have something in it at the same time?

Payoff 2n (St. Petersburg). Charge to play?

Probability to be the last to try pitcher?

Surprise test impossible logic?

Sphere or Torus using rocks?

Hourglass weigh more falling or at rest?

1 poisoned bottle in 1000. Prisoners needed?

P1 (4 of kind), P2 (3 of kind). Worst possible hand?

Break stick at 2 random points. Triangle prob?

Camel 3000 bananas, 1k km. Max reach?

Spheres with 6cm holes. Which has more volume?

Irrational number ^ irrational power = rational?

1st sits random. Last gets assigned seat prob?

100 cheating husbands. Execution day?

Truth 3/4 times. Says 6 on a die. Prob it's a 6?

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