brain teaser for the highly educated
595585
I bought this book for some friends of mine who know everything - the book lists lots of questions, which i found impossibly hard but my friends knew many of the answers. it would work best with someone who is very well read, otherwise i imagine it would be frustrating. the questions are pure knowledge - who did this, where was that. they are not puzzles that you can figure out by logic.
126377
This is a great game to test your brain and your math skills. If you like brain teasers, riddles, word problem solving then this is an inexpensive treat for your brain. Play it with a group of your peers to see who has the sharpest mind. Enjoy!
3812686
Why explain something with an image when you can use three or four!!!
A surprising intellectual tour de force, with some interesting cliffhangers
565006
I am using this book for a grad school course about Problem Solving. This course is also being used with the books "How to Solve It" by G. Polya and "An Open-Ended Approach" by NCTM.
This book are logic problems and puzzles. There are Arithmetic CXII Puzzles (112 problems), "Quibble"  or "Catch" Puzzles, Word and Letter Puzzles, and they all have solutions. There is also Keys/Clues to Arithmetical Puzzles and their proofs.
Example of problems:
Problem: Subtract 45 from 45 in such a manner that there shall be 45 left.
Problem: A man, being asked how many pennies he had in his pocket, replied, "If I divide them by 2, by 3, by 4, by 5, or by 6, I shall always have one over."
Problem: By use of addition and multiplication of the numbers 1 to 9, make 100. Each number can only be used once.
Problem: A boatman has to ferry across a stream a wolf, a goat, and a basket of cabbages. His boat is so small that only one of the three besides himself, can be contained in it. How is he to manage, so that the wolf shall have no opportunity of killing the goat, or the goat of eating up the cabbages?
Problem: William gives Thomas as many dollars as Thomas has. Thomas then gives William as many dollars as William has left. This done, William has 36 dollars and Thomas has 42 dollars.
How much did each have at first?
The problems also get much more difficult.
The solutions/answers to all the above problems using algebra and/or illustrations/charts/graphs are available in this interesting book. If you are an upper level math teacher that wants to give students extra credit regarding these math problems, this would be a good book for you to have in your teacher library.
1728631
This was a gift for our 7yo for Christmas, who is a math whiz and logic nut.  It was the perfect gift.  It engages his little brain in a different logic puzzle every time we play.  If you play to 30, like the instructions say (a codemaker gets 1 point for every guess the codebreaker takes), he beats me every time. He is better at logic! He always solves in fewer guesses than I do.

This is a very fun game, and an excellent exercise in logical thinking and analysis for children ages 8 and up (or 7 and up if they're a math and logic nut like mine!)
1166936
This will come in handy when I am teaching!  It has great brain teasers for kids and adults to do!  There was a few that I didn't figure out.  I also like that it has a button to go on to the next brain teaser.
381572
Kept me entertained on a car trip. Some questions were hard, thank goodness for the hint option. Some were obviously easy. I would recommend to a friend that was interested in brain teasers. I got this Kindle book for free in return for an unbiased and honest review.
3187488
I received the second volume as a gift and have enjoyed it so much I knew I needed this first volume too.
These cryptics are cryptic, of course, but they are composed using remarkably few words, a style I consider genius.  For a cryptic solver, to encounter a definition of only two words is almost impossible.  As a result, many call for a good deal of thought to winkle out the answer.
How much do I prize these books?  I fill in only when I need to, when I can't keep the answers in my head.  And I write faintly in pencil, so I can erase and put the books away to solve again.  These cryptics are special.
3427710
I got this to so with my father as an exercise for his memory.

 True, the print is large enough to read & the puzzles are fairly short - however, they contain a fair amount of words not in common usage for American-English. I do alot of crosswords, but some of these have me unusually stumped. The clues are also fairly inscrutable, as well.  The puzzles aren't impossible to do - more like awkward due to the mix of very uncommon words with overly simplified clues.

The book is not suiable to my needs.
2254402
If you want something that has really great brain teasers, this is your book. You will spend time working on some of these but it will be worth it. The answers are in the back of the book just in case you get stumped. :-)
846668
An excellent book of puzzles for someone new or an old hand at these brainteasers. Just as an aside,the copy I have was printed in the UK by Running Press,but the cover is the same as shown here;although the description says there are only "over 300" puzzles,not 400. It alo states it has 512 pages where mine has 480. However,I think they are much the same book.
 The author,Nathan Haselbauer ,is the founder and president of The International High I.Q.Society. As far as I know this is the 3rd such book of puzzles he has published,all in recent years. He is not as well known for Mensa type puzzles as some of the others we are familiar with on this side of the "big Pond".By and large the puzzles are of the "Quick" type,and many can be solved in the matter of a couple of minutes. Then,there are others that will take considerably longer. There is not much in the way of new or original puzzles,as they are the type that are quite common. Answers ,though little in the way of clues or explanations, are given to all the puzzles. There is a good mix of puzzles,but there is a fair amount of type repetition .For instance with puzzles such as Sudoku,Spot the Difference,Mazes,Buy-Buy,Jigsaw Puzzles,Shadows,Stamp It Out,Box Clever,Sequence Conundrum,Hexagony,Odd One Out,Follow The Thread,Shape Spotter,Cut Out,In The Count,etc,there are several of each.
 Several of the puzzles such as the Jigsaw and Hexagony could be made up in cardboard or wood a puzzles for anyone who likes to construct puzzles.
 For those interested, there is an excellent website [...] that gives information on the Society and a nice group of puzzles,and somewhat different from those found in the book.
 Anyone interested in puzzles will get a lot of enjoyment from this collecion of puzzles and particularly if wanting a change from just Crosswords,Wordsearch and Sudoku.
2396573
This large-format activity book has nine sections:
Animals
Earth
Space
Humans
Around the World
History
Science
Technology
Sports

Each section has the answers to questions kids might wonder about, like "Why don't bats get dizzy hanging upside down?" or "Why does binary computer code use ones and zeroes?" There's a simple paragraph answering the question. A few pages have more information, but most Q and A pairs take up just the top section of the page.

The rest of the page has a pencil and paper activity, like mazes, Sudoku, writing and drawing prompts, matching games, and word puzzles. There are answers in the back of the book.

Each topic has about ten pages, so this book really has hours of fun activities.
1293608
I recommend this text for teachers looking for brain teasers to use with students. A great collection of easily usable material.
1013543
Great brain exercise, a real challenge in some cases, but I love it. Plus you can't beat the price FREE
228498
Very interesting. Bought it for my 10yo grandson.  It's a new spin of Rubik's cube but when open it snakes out (to almost look like molecules) and you have to get it back together.  Definitely a brain teaser.
688821
3,285 Bible Questions and Answers is a puzzle lover's paradise, contain9ing more than 300 challenging, informative, and entertaining puzzles drown form both the Old and New Testaments.  Now you can test your skill, test your memory, test your knowledge of the greatest story every told, from the creation to the crucifixion, from Adam and Eve to David and Goliath, from Moses and the Israelites to Matthew, Mark, Luke and John.

Inside you'll find a wide assortment of fun and fascinating puzzles, including fill-in-the-blank, matching puzzles, find the missing answer, true or false, and multiple choice.  Through the delightfully diverting format, you have the opportunity not only to reacquaint yourself with the remarkable text, but also to discover an intriguing array of biblical events, topics and personalities that may have escaped your notice before....

You don't have to be a biblical scholar, you don't have to cite chapter and verse to find hours of insight and enjoyment in 3,285 Bible Questions and Answersthe book in which every puzzle is a revelation
3843074
Very cool puzzle. Still having a hard time figuring it out. I'm not so good with brain teaser puzzles like these, but I do like it for the aesthetics.