Collection of number puzzles. There are logic problems, mathematical puzzles, matrix problems, series puzzles, and many more besides.

It's not elementary, but you will need Holmes's famed powers of deduction to solve these crafty puzzles. Here's how it goes: at the end of each condundrum, you'll find at least one condition - and sometimes more - that the solution must meet.

It’s puzzle nirvana for crossword lovers who have just a few minutes to spare, but still crave a challenge. Adapted from the popular Mensa 10-Minute Crossword Puzzles Page-A-Day Calendar, Mensa 10-Minute Crossword Puzzles strikes a perfect balance: The puzzles are tough enough to be sanctioned by Mensa, the internationally famous high-IQ society, but are designed to be solvable in ten minutes or less. Expertly written by puzzle master Fred Piscop, Mensa member, author of the Mensa calendar, and frequent crossword contributor to both The New York Times and The Washington Post, these cleverly themed crossword puzzles will appeal to both seasoned solvers and novices looking to hone their skills. They are an addictive addition to your morning routine (just add coffee); perfect for evening downtime; just right for your commute on the subway, or while waiting at the doctor’s office or sitting in a restaurant—anytime you need a mental pick-me-up. The book’s chunky format, which works so well for puzzle books like The Original Sudoku series, fits easily into a purse or bag. An answer key is included at the back of the book.

"These visually unique braintwisters will put your puzzle-solving abilities to the ultimate test!"--Page 4 of cover.

A wide variety of puzzle types have been included from societies around the world. Many include a historical introduction and advice on how to solve them from Mensa's top puzzle-setters.

Try any of these 150 word, number, and logic puzzles, and you'll encounter some surprising new ways to analyze, observe, and decide. You've been warned, so don't get frustrated when you feel yourself getting pushed out of the ruts of your usual problem-solving skills. Try these sample warmup exercises: 1. If Molly's daughter is my daughter's mother, what am I to Molly? 2. Which is larger, one-third times one-third of a dozen dozen, or one-third dozen halved and cubed? 3. How old is the man who told his friend, "Four years from now I'll be twice as old as I was fourteen years ago"? Answers: 1. I am Molly's daughter. 2. The first calculation is larger. 3. He's 32 years old.