Four books are stacked on a shelf. The history book is directly on top of the poetry book. The science book is below the poetry book. The math book is above the science book and below the history book. What book is at the very bottom of the stack?
Science book
Let's build the stack from top to bottom based on the clues: History is above Poetry (History, Poetry). Science is below Poetry (Poetry, Science). Math is between History and Poetry/Science. Specifically, Math is below History and above Science, meaning the order from top to bottom is History, Math, Poetry, Science. Therefore, the science book is at the very bottom.
About this riddle
Logic riddles give you a few facts and ask what must be true. List what you know, cross out what cannot be, and see what is left.
Difficulty: Medium. More like this: Logic riddles with answers or try Einstein's Logic Grid for a different kind of puzzle.
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