From the archive · #160

A little curiosity.
From the archive.

Five flashcards. A fresh discovery. Your moment to get a little more out of the world.

June 9, 2026Chance & ParadoxesNo account needed · No timer
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Prompt: This birthday-sharing puzzle reaches just over a 50% match probability with 23 people under the usual equal-day assumptions.
Math & LogicA little curiosity
Probability or paradox · RECALLThis birthday-sharing puzzle reaches just over a 50% match probability with 23 people under the usual equal-day assumptions.Think it. Then flip it.

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See these five prompts
  1. 01This birthday-sharing puzzle reaches just over a 50% match probability with 23 people under the usual equal-day assumptions.
  2. 02This quantum thought experiment puts a feline in a box with a mechanism linked to radioactive decay.
  3. 03This branch of mathematics studies counting, arranging and selecting objects.
  4. 04This fallacy treats an independent losing streak as evidence that a win is now due.
  5. 05This ancient Greek philosopher's paradox divides a journey into endlessly smaller distances to challenge the possibility of motion.