I. The Giraffe Problem II. The Kiss Problem III. The Free Meal Problem IV. The Win-and-Lose-Problem V. The Handkerchief Problem VI. The Identity Problem VII. The Shakespearean Problem VIII. The Impersonation Problem IX. The Alibi Problem X. The Threepenny Problem XI, The Q-Loan Problem XII. The Pig-Keeper’s Problem [Frontispiece: A bus-conductor with passengers on a bus. The conductor carries a pad of tickets and a change purse, and stands before a passenger wearing a clerical collar and hat. Another passenger looks over his newspaper at the bus-conductor and smirks. Caption: ‘“Oh yes,” he said, “I heard. If you want all them threepennies, you’d better get them…
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