Over 60 baffling brain benders: Two Glasses of Port, Wolf in Sheep's Compound, The Infinite Chessboard, Bughouse Binary, more. Answers.

## Puzzles in Math and Logic

## Entertaining Mathematical Puzzles

Playing with mathematical riddles can be an intriguing and fun-filled pastime — as popular science writer Martin Gardner proves in this entertaining collection. Puzzlists need only an elementary knowledge of math and a will to resist looking up the answer before trying to solve a problem. Written in a light and witty style, Entertaining Mathematical Puzzles is a mixture of old and new riddles, grouped into sections that cover a variety of mathematical topics: money, speed, plane and solid geometry, probability, topology, tricky puzzles, and more. The probability section, for example, points out that everything we do, everything that happens around us, obeys the laws of probability; geometry puzzles test our ability to think pictorially and often, in more than one dimension; while topology, among the "youngest and rowdiest branches of modern geometry," offers a glimpse into a strange dimension where properties remain unchanged, no matter how a figure is twisted, stretched, or compressed. Clear and concise comments at the beginning of each section explain the nature and importance of the math needed to solve each puzzle. A carefully explained solution follows each problem. In many cases, all that is needed to solve a puzzle is the ability to think logically and clearly, to be "on the alert for surprising, off-beat angles...that strange hidden factor that everyone else had overlooked." Fully illustrated, this engaging collection will appeal to parents and children, amateur mathematicians, scientists, and students alike, and may, as the author writes, make the reader "want to study the subject in earnest" and explains "some of the inviting paths that wind away from the problems into lusher areas of the mathematical jungle." 65 black-and-white illustrations.

## Perplexing Puzzles and Tantalizing Teasers

## Mathematical Fun, Games and Puzzles

## 101 Puzzles in Thought and Logic

## Mathematical Puzzles and Curiosities

"Very satisfying." — Will Shortz, Crossword Editor, The New York Times. This new collection features an intriguing mix of recreational math, logic, and creativity puzzles, many of which first appeared in the author's Daily Telegraph (UK) column. Requiring only basic algebra skills, classic and new puzzles include The Monty Hall Problem, The Unexpected Hanging, The Shakespeare Puzzles, and Finger Multiplication.

## The Alien IQ Test

## The Universe in a Handkerchief

*Lewis Carroll’s Mathematical Recreations, Games, Puzzles, and Word Plays*

## Intriguing Mathematical Problems

Treasury of stimulating, challenging brainteasers includes puzzles involving numbers, letters, probability, reasoning, whole numbers, more. The Enterprising Snail, The Fly and the Bicycles, The Lovesick Cockroaches, Mr. Wright and the Insurance Salesman, many others. No advanced math needed. Solutions included.