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Paradox Riddles

Part of Impossible Riddles collection

Explore 20+ unique, interactive paradox riddles puzzles.

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Showing Paradox Riddles riddles

Sleeping Beauty Dilemma

Coin flipped: Heads = woken once, Tails = woken twice. Woken up, what is...

2,626 solved Paradox Riddles

The Dichotomy Paradox

To reach a wall, you must cover half distance, then half of remaining, infinitely....

2,968 solved Paradox Riddles

The Birthday Paradox

In a group of 23 people, what is the probability two share the same...

2,587 solved Paradox Riddles

The Cable Car Paradox

If a cable car moves at constant speed, why does pulling the brake cable...

2,574 solved Insect Riddles

The Prediction Paradox

If a computer can 100% predict human choices, and tells you its prediction, can...

4,661 solved Paradox Riddles

The Grandfather Time Loop

If a tree falls in a forest and no one is around to hear...

4,014 solved Paradox Riddles

The Liar’s Paradox

This sentence is false. Is it true or false?

2,575 solved Paradox Riddles

The Unexpected Examination

A teacher announces a surprise exam next week. Students prove it cannot happen on...

3,832 solved Paradox Riddles

The Crocodile Paradox

Crocodile steals child, promises return if father guesses correctly. Father says: 'You will not...

1,294 solved Paradox Riddles

The Arrow Paradox

A moving arrow is at rest at every instant of time. Therefore, motion is...

2,150 solved Insect Riddles

Hilbert’s Hotel Paradox

A fully booked hotel with infinite rooms can fit infinitely more guests. How?

4,214 solved Paradox Riddles

The Bootstrap Paradox

An author receives a book from the future, publishes it, and it becomes the...

3,461 solved Paradox Riddles

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