EntityQ180191· pop 15· linked from 107 articlestwo envelopes problemSign in to savebrain teaser, puzzle, or paradox in logic, probability, and recreational mathematicsConnectionsparadoxEntityexpectationEntityNewcomb's problemEntityBoy or Girl paradoxEntityInternational Standard Book NumberEntityErwin SchrödingerEntityprobabilityEntityPierre-Simon LaplaceEntitynecktieEntityhypothesisEntitydigital object identifierEntityInternational Standard Serial NumberEntityprobability theoryEntityenvelopeEntitybibcodeEntityBayes' theoremEntityprisoner's dilemmaEntityQ118398EntityMartin GardnerEntityZeno's paradoxesEntityCategoriesDecision-making paradoxesProbability problemsProbability theory paradoxes