Brain-Twisters I

"Lady or the Tiger" puzzles, a seemingly easy problem in Euclidean geometry, and a dictatorial conundrum involving the reproduction of hermaphrodites.

Brain-Twisters II

Brought back by popular demand, yet more of the "Lady or the Tiger" puzzles.

Brain-Twisters III

Inheritance problems, bankers who do not all speak the truth, and two simple puzzles in elementary geometry.

Brain-Twisters IV

Yet more of the "Lady or the Tiger" puzzles, a variation on one of the geometry puzzles presented last month, and the perils of proofreading.

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