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ThinkFun Family Brainstorms Challenge of the Week

Each week we feature a new puzzle that you can print out in black and white on a single page and use as a black line master with your students. Schools have reported great success by encouraging families to work on the puzzles together at home. Print out the PDF file, file the solution page and make copies of the Challenge page to hand out to your students.
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 Pigs in Stalls I need to get 21 pigs, in 4 different stalls, and i have to have a odd number in each stall. i seen this in a magazine. And i need some help. I dont think it can work.. Download PDF Version (185 KB)
 Square Skate This little "skate" can be divided into four identical parts which can form a perfect square. The only task is to find these four parts... Download PDF Version (165 KB)
 The M Puzzle Make a symmetric letter M using four pieces. How many strange shapes will you see before you get your perfect letter M? Download PDF Version (224 KB)
 A Battle Royal Make the pieces of the broken chess board be rearranged to bring the board again to the life and to make it available for the next chess games. Download PDF Version (233 KB)
 Chair Arrangement A set of chairs has to be arranged along the walls of a rectangular dance hall in such a way that there are an equal number of them along each wall. What pattern to choose for this? Download PDF Version (178 KB)
 Funny Fold A funny C letter states it can be folded from some capital letter and only within one fold. But what letter it can be if C insists it was not a capital L? Download PDF Version (230 KB)
 News Folder Guess how many times you will be able to fold a newspaper sheet of big size folding it every time across in half. Download PDF Version (253 KB)
 The Hatfield House Maze Enter a garden maze at one entrance, then pass through the maze's center and after that leave it on the opposite side. That is the simple objective of the Maze at Hatfield House. Download PDF Version (167 KB)
 Key Word 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? Download PDF Version (183 KB)
 Serpentine Lines Choose from among of eight serpentine lines only three ones which can be stack up so that they will form a beautiful grid... Download PDF Version (154 KB)
 Simple Train Exchange Another gem in our series of puzzles where several things should be placed so that each of them touches every other. This time you'll need... six and more pencils. Download PDF Version (259 KB)
 The Six Pencils Another gem in our series of puzzles where several things should be placed so that each of them touches every other. This time you'll need... six and more pencils. Download PDF Version (277 KB)
 Move the Train A train engine that was pulling over a hundred cars loaded with freight came to a stop at a junction. The engine detached and a new train engine backed up and coupled onto the long line of freight cars. The new engine then tried to move forward... but was unable to budge the long line of heavy freight cars... Download PDF Version (279 KB)
 Heavy Weight 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?.. Download PDF Version (462 KB)
 The Lost Star Several triangles and quadrangles joined together create an intricate pattern where some perfect star is hidden. Discover that lost one. Download PDF Version (160 KB)
 Spider Ride What is the shortest trip for a spider to get from one spot on a rectangular box to another? Does the straight and clear line that it seems to be at first sight will be the shortest? Download PDF Version (278 KB)
 Pencil Illusion Three pencils are drawn on the surface of a cylinder. When you rotate the cylinder clockwise you'll discover that the three pencils turned... into just too. How this could happen? Download PDF Version (278 KB)
 Bugs' Traffic 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? Download PDF Version (314 KB)
 The 7 Knights Problem 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? Download PDF Version (238 KB)
 Four Stacks Jumping 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. Download PDF Version (172 KB)
 Cross vs. Square The four identical pieces can be simultaneously used to form a Greek cross and a perfect square. Can you discover both of these shapes? Any ideas how on it? Download PDF Version (228 KB)
 Disk in2 Ovals Can you divide a circular table top into the fewest number of pieces so that they could be rearranged into the seats of two oval stools with open handholds? Download PDF Version (169 KB)
 The Testa It consists of nine rectangles, it uses five colors, and it reminds you of the "different-colors-in-rows-and-columns" challenge all the way. Download PDF Version (230 KB)
 The Marbles & Rows Puzzle Everybody knows how it's pleasant to play with marbles. To make it more puzzling we simply place marbles of four different colors onto nine squares and... the Marbles & Rows puzzle appeared! Enjoy! Download PDF Version (296 KB)
 Square Intersection 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? Download PDF Version (168 KB)
 Missing Page... As Mr. Hackett picks up his morning paper, one of the sheets slips out. Simply by seeing the two numbers on the pages facing you, can you deduce how many pages are in the whole paper? Download Puzzle (74 KB)  |  Download Solution (60 KB)
 Magic Triangle... Mrs. Holderman, the math teacher, has given Karen a special math problem. She is to arrange the numbers from 1 to 6 in the triangle so that the sum of each straight line of three circles gives the same result. How would you place the numbers? Download Puzzle (65 KB)  |  Download Solution (63 KB)
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 Last Updated: June 16, 2011 top
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