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Genius Level Riddles

Part of Hard Riddles collection

Explore 20+ unique, interactive genius level riddles puzzles.

Only 2% of people can solve these. The hardest, most brain-breaking riddles for intellectual titans.

Interactive Riddle Challenge

Showing Genius Level Riddles riddles
Hard +24 XP
The Continuum Hypothesis
Is there a set whose size is strictly between the size of the natural...
6,329 solved Genius Level Riddles
Hard +25 XP
The Twin Prime Mystery
Are there infinitely many pairs of prime numbers that differ by exactly 2 (like...
9,860 solved Genius Level Riddles
Hard +13 XP
The Godel Sentence
In any consistent formal system that can express basic arithmetic, there exists a statement...
14,786 solved Genius Level Riddles
Hard +11 XP
The Self-Referencing Set
Let S be the set of all sets that do not contain themselves. Does...
13,352 solved Genius Level Riddles
Hard +15 XP
The Monkeys and Shakespeare
Given infinite time, would monkeys randomly typing on keyboards eventually produce the complete works...
15,540 solved Genius Level Riddles
Hard +22 XP
The Unprovable Truth
According to Godels theorem, in any sufficiently powerful mathematical system, there are statements that...
21,173 solved Genius Level Riddles
Hard +10 XP
The Collatz Conjecture
Take any positive integer. If even, halve it. If odd, multiply by 3 and...
17,319 solved Genius Level Riddles
Hard +14 XP
The Banach-Tarski Ball
A mathematical theorem says you can take a solid ball, split it into a...
18,013 solved Genius Level Riddles
Hard +16 XP
The Zenos Arrow
An arrow flies toward a target. At any instant, the arrow is stationary (it...
6,824 solved Genius Level Riddles
Hard +19 XP
The Halting Problem
Can you write a program that takes any other program as input and correctly...
19,042 solved Genius Level Riddles
Hard +15 XP
The Sleeping Beauty
Sleeping Beauty is put to sleep. A coin is flipped. If heads, she wakes...
16,885 solved Genius Level Riddles
Hard +13 XP
The Newcomb Problem
A predictor (always right) puts $1000 in box A. Box B has $1M or...
24,252 solved Genius Level Riddles
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