Which online mystery launched a recruitment-style puzzle on 4chan to identify highly intelligent individuals for unclear purposes?

• A. Cicada 3301
• B. Voynich Manuscript
• C. Rongorongo
• D. Toynbee Tiles

Answer: (A)

This item asks you to name the online mystery famous for using recruitment-style puzzles on 4chan to attract highly intelligent people for unclear purposes. Cicada 3301 began around 2012 with public postings that invited exceptionally capable solvers to prove themselves by tackling a sequence of increasingly hard puzzles. The challenges spanned cryptography, steganography, number theory, and references to classical literature, demanding not just technical skill but broad lateral thinking. The tone of the messages suggested a secret organization was looking for recruits, yet the group's aims remained deliberately undisclosed, fueling ongoing speculation about who was behind it and why. The other options are unrelated: the Voynich Manuscript and Rongorongo are enigmatic scripts, and Toynbee Tiles are urban art—none launched a recruitment-driven puzzle on 4chan. So Cicada 3301 is the match.