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Expert Riddles for Adults

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?

Hard Math and Logic

5 bandits split 100 coins. Senior proposal?

Hard Math and Logic

Families stop childbearing after 1st boy. Sex ratio?

Hard Math and Logic

4 people: 1, 2, 5, 10 mins. Bridge (max 2). Min time?

Hard Math and Logic

3 doors: Heaven, 1-day Hell, 2-day Hell. Avg days?

Hard Math and Logic

110m rope. 1ft slack added/pulled up. Truck fits?

Hard Math and Logic

Which is greater: e? or ?e?

Hard Math and Logic

Surgeon with 2 gloves must operate on 3 patients. How?

Hard Math and Logic

Duck in pond. Cat runs 4x faster on edge. Escape?

Hard Math and Logic

1/4 into tunnel. Meet train at start or end. Speed ratio?

Hard Math and Logic

Sum of digits from 1 to 1,000,000?

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