Martin Gardner Puzzles
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This page gathers all puzzles presented at Puzzles.COM, which are either created by Martin Gardner or made after some of his puzzle ideas.

 Find the Center by Martin Gardner See how several bows inside a circle make you stuck in the illusion about where the true center of this circle is. Can you get out of it with the help of your eyes only? Play  |  Download
 Out of Glass after Martin Gardner Get the cherry outside the glass moving exactly two matches. Great classic! Play  |  Download  |  Matchstick Puzzles
 Red, White, and Blue Balls after Martin Gardner It's known there is one heavier ball in each of the three pairs. Now the object is using a balance scale in just two weighings to determine the light and the heavy balls in each pair... Play  |  Download
 Fish's Weight after Martin Gardner This classic puzzle gem easy shows that sometimes it can be not very easy to understand how much a simple half of a whole is. Play  |  Download
 Heavy Weight after Martin Gardner Two weighings are required to identify the heavier thing among the four identical ones. Two weighings are required for the nine things as well. But how on it in the latter case?.. Play  |  Download
 Big Cross-Out Swindle after Martin Gardner Cross out something in a line of letters to get another something. Of course, you will be provided with both "something" - the point is to get them right. Play  |  Download
 Key Word after Martin Gardner When the four arrows on the four keys are replaced with some respective letters on them, a very familiar word can be typed with those keys. What word it could be? Play  |  Download
 What Animal? after Martin Gardner A set of five different letters can be arranged in such a way that to produce the name of an animal. Now the first question that might appear what familiar animal should it be? Play  |  Download
 Fill-in-Words after Martin Gardner Complete six three-letter words with the missing middle letters in them so that except these words a new six-letter word which would be a name of a sea animal could appear. Play  |  Download
 Shortest Connection after Martin Gardner Suppose you have to build a railroad network between four cities placed in the corners of a perfect square. What pattern must you choose to minimize it? Play  |  Download
 Six Numbers by Martin Gardner Solving this puzzle you can circle with a feeling that you're one step before your goal or... one step behind. Is there any kind of joke to get exactly on it? Play  |  Download
 Up to 100 by Henry E. Dudeney and Martin Gardner Digits 1 through 9 stand in a row in ascending order. Just insert a number of pluses and minuses between them and get 100. And what about the descending order? Play  |  Download
 Darts Count after Martin Gardner How many darts will you need to toss and which rings with numbers will you need to target in order to score exactly 100? Before scoring this number you can try to score the 50 first. Play  |  Download
 Cube Dates after Martin Gardner It is said that two cubes with twelve digits on their faces are enough to produce any date of year from them. Can you discover how the digits should be placed on the cubes? Play  |  Download
 Crazy Cut after Martin Gardner The only cut has to be done to divide this strange figure into two identical parts. The question is where it should go through? Play  |  Download
 Crazy Cut Suite after Martin Gardner Four shapes. It is said each of them can be divided into two identical pieces. The goal is to find the proper positions for the dividing cuts. How complicated the dissection challenges can be? Play  |  Download
 The Triamond after Martin Gardner A trapezoid which is formed by joining three equilateral triangles is called a triamond. The triamond can be cut into four congruent parts. But it is said there are two different ways to do that. Check it! Play  |  Download
 Six Cubes by Martin Gardner Is there any successful way to arrange six identical cubes into some shape so that every cube in the shape will get in touch with others? Play  |  Download
 Cube Angle after Martin Gardner Two lines are drawn on the two sides of a cube. They are drawn form the same corner and the question is which angle do these lines form? How to figure that out? Play  |  Download
 Square Intersection after Martin Gardner This geometrical problem is about an elegant and neat way how to figure out the exact area of the overlapping of two squares. Don't you want to discover this way by yourself? Play  |  Download
 Rectangle Around after Martin Gardner Figure out the diagonal of a rectangle when it is inscribed in the quadrant of a circle. How long, do you think, it will take you to get the right answer to this geometrical question? Play  |  Download
 Rays Through the Squares after Martin Gardner The three rays that come through the three squares create the three angles. A proof is required to be found that the sum of two angles equals the third one. Play  |  Download
 Hexagon Inside the Cube after Martin Gardner It is quite easy to get the cross sections in form of a square or a regular triangle from a cube. Is it so easy to get the cross section of a regular hexagon from the same cube? Play  |  Download
 Outside the Hole after Martin Gardner A disk of certain diameter is removed from a piece of paper creating a circle hole in it. The goal is to calculate the area which still remained around the hole. Play  |  Download
 The Earth Belt by Martin Gardner Imagine a steel belt is stretched tightly around a big planet. What things can be possibly slipped under the belt, if a meter of steel added to the belt raises it off the sphere's surface by the same distance all the way around? Play  |  Download
 A Bottle and a Cork after Martin Gardner Is it difficult to figure out the exact costs of two things when you know their total cost and a difference only? Don't let the figures mislead you while counting. Play  |  Download
 The Mutilated Chessboard after Martin Gardner Another classic puzzle gem that should bring you an "aha!" no matter, if you solve it by yourself or go right to the solution page. Enjoy the beauty of the logical proof! Play  |  Download
 Colored Names & Hair after Martin Gardner The last names of Merle White, Leslie Black and Jean Brown don't match the colors of their hair. From a little conversation between them can you determine the color of Leslie Black's hair? Play  |  Download
 Bugs' Traffic after Martin Gardner The four bugs standing in the corners of a square start to crawl one toward each other. Here comes the question: How far does each bug travel before they all meet? Play  |  Download
 Cube Cuts after Martin Gardner It is said a cube can be easily cut into 27 smaller cubes with six straight cuts. Can this number of necessary cuts be reduced by arranging the pieces after each cut? Play  |  Download
 In 'n' Out after Martin Gardner How to guess whether a certain region is inside a closed curve or outside it when a part of the curve is not visible? Is there any clear and simple method to do this? Play  |  Download
 How Old is the Rose-Red City? after Martin Gardner Read through five lines expressed in verse and try to come up with an exact age of the Rose-Red city. Be careful and accurate while calculating in order to avoid any mistake. Play  |  Download
 Next Symbol after Martin Gardner It seems a sequence of five odd symbols can be proceeded. Will you need the sixth sense to figure out the sixth symbol? Play  |  Download
 The Two Spirals by Martin Gardner Two almost similar spirals... One of them consists of a single piece of rope, while the other is formed with two separate pieces of rope. The question is which is which? Play  |  Download
 Name the Month by Martin Gardner It is said this set of strange symbols stands for a month. What should be the possible approach to break this "code" down and thus, decipher what month it can be? Will it be a forthright approach or more complicated? Play  |  Download
 The Rule by Martin Gardner It is known there is a rule connecting different patterns in each given row of their array. The challenge is to figure out what is the rule and then properly applying it complete the last row of them. Play  |  Download
 Counting the Squares after Martin Gardner There are several squares of different sizes hidden in a simple shape. You goal is just to identify the exact number of them, not overlooking even a little single square. Play  |  Download
 The Cat after Martin Gardner How many different triangles can you count in the picture of the cat? Play  |  Download
 The Twiddled Bolts by Martin Gardner When two identical bolts are placed together so that their helical grooves intermesh, what it is supposed to happen when the bolts are moved around each other in the clockwise direction? Play  |  Download
 Strip to Cube by Martin Gardner A strip of six squares is not among those hexominoes that can be folded into a one-unit cube. But it's said the seventh square added to the strip may help. Play  |  Download
 Square to Cube by Martin Gardner Cut out some shape from a perfect square, then apply to it some folding and get... a perfect cube. It's not squaring the circle, but could it be cubing the square? Play  |  Download
 Unattacked Cells after Martin Gardner Do you believe five chess queens placed on a 5x5 board create a unique pattern when a maximum number of unattacked vacant cells is left? Play  |  Download
 The Knight's Tour after Martin Gardner Make a knight's tour on a small chess board visiting every cell only once and then returning to the initial cell. You may start from any cell of the board. Play  |  Download
 Three Queens by Martin Gardner Is it possible to place three chess queens on a single non-standard board so that all vacant cells are attacked? How many ways to do this can you find? Play  |  Download
 The Knight's Tour 2 by Martin Gardner A chess knight wants to travel around a 6x6 board making the longest possible tour without self-crossings of his route. Can you help him to do it? Play  |  Download
 The Four Queens after Martin Gardner Development of the chess queen theme. This time it's in the little shift that no queen can attack another - simply let 'em live in peace on a small chessboard. Play  |  Download
 The 7 Knights Problem after Martin Gardner It is easy to place 7 chess knights on a 3x3 board. But it becomes a little bit different when there is a rule to move the knight after you place it on the board, don't you say? Play  |  Download
 Pentomino Problem after Martin Gardner The 6x10 rectangle arranged from twelve pentominoes is a base for a 2-in-1 puzzle. First is the dissection challenge. Second is the put-together problem. Can you solve them both? Play  |  Download
 No More Squares by Martin Gardner More than two dozens of squares are hidden in a simple 4x4 match square grid. But less than a dozen matches is required to be removed to destroy all them for good. Play  |  Download
 Collating the Coins by Martin Gardner Change the order of five coins in a chain from big-small-big-small-big to big-big-big-small-small. Another classic puzzle gem! Play  |  Download  |  More Millennium Puzzles
 Four Stacks after Martin Gardner Tumping over two coins every time rearrange a row of eight coins into four stacks of two coins each. It can be done in four jumps - just keep jumping. Play  |  Download
 Coin Distances after Martin Gardner Two distances are associated with three coins. Could you find a certain position of the coins so that the distances are equal? Is there any way how the moving coins can distract you from the mission? Play  |  Download
 Missing Piece after Martin Gardner Can you find the missing piece of cake? It seems that someone took it... Play  |  Download
 Crazy Lines after Martin Gardner Sometimes a perspective brought into a picture may bring there a kind of illusion as well. Make sure the picture will not mislead you while finding out the truth. Play  |  Download
 Compass in a Watch after Martin Gardner Have you ever known that your watch can be used as quite a good and reliable compass? There is an easy way how to convert your working indicator of time into a working indicator of direction. Play  |  Download
 Fold to Turn after Martin Gardner Why does a bill behave so strange to be upright all the way? Maybe it simply doesn't like to be folded and unfolded? Play  |  Download
 Magic Triangle after Martin Gardner Make a triangle of six pieces. Now simply rearrange the pieces within the triangle and you get... a rectangular hole in it. How did this happen? Play  |  Download
 Count Trick after Martin Gardner Believe it or not, they say everyone who calculates not too bad makes... a mistake while sum up these eight numbers. Make sure about it! Play  |  Download
 Three Dice after Martin Gardner Enjoy one mathematical trick based on a fact that the sum of the numbers on the opposite sides of a die is always seven. Play  |  Download
 Mirror Drawing after Martin Gardner Do you wanna feel like a little child for a moment? Then try to draw a line, but only in a slightly different..."mirror" way. Play  |  Download
 Falling Box after Martin Gardner How to make a box of matches fall on one end and stand. Does it really need some portion of thinking "out of the box"?! Play  |  Download
 Catch or Pass after Martin Gardner Do you want to see if your friend can catch the postcard when you let it fall down? Play  |  Download
 Last Updated: June 1, 2016 top
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