# Nick's Mathematical Puzzles

Welcome to my selection of mathematical puzzles. What's new? See puzzle 160. The math puzzles presented here are selected for the deceptive simplicity of their statement, or the elegance of their solution. Explaining how an answer is arrived at is more important than the answer itself. Each puzzle is assigned a level of difficulty of between one and four stars, with four being the most difficult. The source for each problem is given at the bottom of the solution page. I welcome feedback of any kind. Some brief biographical information. Nick Back to top Related:  History of Mathematics

Expand Your Mind - Puzzles and Brain Teasers To expand your mind you need to learn new facts and develop new modes of thinking that will make the information that you already know more useful. Solving the following problems requires a combination of world knowledge, mathematics, common sense, logic, and science (chemistry, physics). This is not an IQ test. There is no time limit. To expand your mind, do not look at the answers until after you have made an honest effort to figure out the problems. The Bear A bear walks south for one kilometer, then it walks west for one kilometer, then it walks north for one kilometer and ends up at the same point from which it started. The Chicken and Egg Problem A chicken farmer has figured out that a hen and a half can lay an egg and a half in a day and a half. The Chicken and Leg Problem A chicken farmer also has some cows for a total of 30 animals, and the animals have 74 legs in all. The Bacteriologist At what time was the container half full? How big was the container? Moon Photographer Eye Puzzle

I Love Math and Young Math ►The "I Love Math" series by TimeLife covers virtually every elementary math concept. These books can be used to explore math concepts within the stated themes, and are possibly the most-read math readers in our home library among all our kids. They are out of print, but many can be found at used booksellers at reasonable prices. To print, click on the printer icon at the bottom of the list Play Ball: Sports Math (I Love Math) - Sports theme math, many concepts explored in one book. Pterodactyl Tunnel: Amusement Park Math (I Love Math) Math puzzles, activities and stories with a dinosaur theme. The Case of the Missing Zebra Stripes Zoo Math (I Love Math) Math thru a trip to the zoo The Mystery of the Sunken Treasure: Sea Math (I Love Math) Math activities with a sea theme Alice in Numberland: Fantasy Math (I Love Math) From Head to Toe, Body Math (I Love Math) multi-math concepts explored with anatomy Look Both Ways: City Math (I Love Math) Math in Life – multi-concept stories and activities

The Math Forum Home Page The Math Forum has a rich history as an online hub for the mathematics education community. A debt of gratitude is owed to the dedicated staff who created and maintained the top math education content and community forums that made up the Math Forum since its inception. NCTM will continue to make many of the most popular parts of the Math Forum content accessible to the mathematics education community. We hope that you will join or continue to be a member of the NCTM community to access even more high-quality resources for teaching and the learning of each and every student. Problems of the Week The Math Forum created Problems of the Week as an integrated program that features problems by standard and additional teacher support materials. Continue Your Math Education Conversations in MyNCTM! MyNCTM is an online community where NCTM members can ask questions, network and connect with each other, start and join discussions, find and upload resources, and interact with education experts.

Math puzzles These puzzles do not require any mathematical knowledge, just logical reasoning. Check, how smart you are. If you cannot solve them, take it easy. Almost all puzzles were told to us by a computer/math genius Vlad Mitlin . Visit us again: we intend to place here new puzzles and the solutions. Please email us your comments and new puzzles: cherk@math.utah.edu. Andrej and Elena 1. Click here 2. A group of four people has to cross a bridge. Solution: Click here To see the animated solution, you need a browser which supports JAVA 3. The distance between the towns A and B is 1000 miles. Generalize the strategy for an arbitrary amount of apples. More problems from Vlad Mitlin Party! There is a group of people at a party. Digits Show that for any natural n, at least one of two numbers, n or n+1, can be represented in the following form: k + S(k) for a certain k, where S(k) is the sum of all digits in k. Zen problem A Buddhist monk got an errand from his teacher: to meditate for exactly 45 minutes. King

The Ultimate Puzzle Site - Brain-Teasers Five sailors survive a shipwreck and swim to a tiny island where there is nothing but a coconut tree and a monkey. The sailors gather all the coconuts and put them in a big pile under the tree. Exhausted, they agree to go to wait until the next morning to divide the coconuts. At one o'clock in the morning, the first sailor wakes up. At two o'clock, the second sailor wakes up. At three, four, and five o'clock in the morning, the third, fourth, and fifth sailors each wake up and carry out the same actions. In the morning, all the sailors wake up, and try to look innocent. Printable Mazes for Kids These printable mazes for kids, or puzzles and mazes in general, are excellent educational worksheets for developing kids small motor skills and spacial perception skills. You can print the traditional printable mazes, counting mazes and PrintActivities exclusive . Follow the happy faces to find the path through the printed maze. Frowning faces are off the correct path. Kids will have fun with these maze printables which appeal to kids from preschool and kindergarten up to grade school. Happy Face Hints Printable Mazes For these mazes for kids, follow the happy faces to the end of the maze. 9x12 Mazes:Happy Face Maze 1Happy Face Maze 2 Happy Face Maze 3 Happy Face Maze 4 Alphabet Letter Shaped Mazes All of these printable mazes for kids are in the shape of a letter of the alphabet. Counting Worksheet Mazes The sets of counting mazes for kids are not traditional mazes with walls. Counting By 1s MazesCounting By 2s MazesCounting By 3s MazesCounting By 4s MazesCounting By 5s Mazes Easter Mazes

Women Mathematicians, Sponsored by Agnes Scott College Welcome to the web site for biographies of women in mathematics. These pages are part of an on-going project at Agnes Scott College in Atlanta, Georgia, to illustrate the numerous achievements of women in the field of mathematics. Here you can find biographical essays or comments on the women mathematicians profiled on this site, as well as additional resources about women in mathematics. Each time this page is reloaded, a randomly selected photo is displayed to the left (if Javascript is enabled). Click on the image to go to the profile of that woman. We also welcome contributions of biographical information or essays from those outside Agnes Scott College. Did you know? The AWM Research Symposium 2015 will be held at the University of Maryland, College Park, April 11-12, 2015. AWM Biographies Contest Agnes Scott College, founded in 1889, is a private liberal arts college for women in Decatur, a part of Atlanta, Georgia. Looking for college scholarships for women?

Mathematical Puzzles Interactive Mathematics Miscellany and Puzzles Excellent. Ken Duisenberg's Puzzle of the Week A good archive to dip into. MathPuzzle.com The webmaster, Ed Pegg Jr, is a twenty year member of the National Puzzler's League, and frequently contributes to the New York Times crossword, Games, and National Public Radio's Sunday Puzzler. The MathSoft Math Puzzle Page Mathematical puzzles featured here have been previously published in Allan Gottlieb's column in the Tech Review. Nick's Mathematical Puzzles The puzzles presented here are selected for the deceptive simplicity of their statement, or the elegance of their solution. The Null Set - Mathematical Puzzles A good selection of puzzles, by Guy Kindler at Tel Aviv University, graded from simple to tough - but most requiring some undergraduate maths knowledge. Number and Word Puzzles 44 monthly puzzles provide entertainment and education for all ages on this Australian website. The Puzzlet Page Enjoy mental workouts? The Puzzling World of Barry R.

Ponder this | pages You are cordially invited to match wits with some of the best minds in IBM Research. Seems some of us can't see a problem without wanting to take a crack at solving it. Does that sound like you? Here is the solution for our March 2014 problem.And now... here's our April challenge! So give your mind a break from its routine---you never know what other problems you may solve in the process! The current puzzlemaster is Oded Margalit.

Patterns are math we love to look at Why do humans love to look at patterns? I can only guess, but I’ve written a whole book about new mathematical ways to make them. In Creating Symmetry, The Artful Mathematics of Wallpaper Patterns, I include a comprehensive set of recipes for turning photographs into patterns. The official definition of “pattern” is cumbersome; but you can think of a pattern as an image that repeats in some way, perhaps when we rotate, perhaps when we jump one unit along. Here’s a pattern I made, using the logo of The Conversation, along with some strawberries and a lemon: Mathematicians call this a frieze pattern because it repeats over and over again left and right. When we can do something to a pattern that leaves it unchanged, we call that a symmetry of the pattern. You can make frieze patterns from rows of letters, as long as you can imagine that the row continues indefinitely left and right. What other symmetries does it have? Suppose a pattern stays the same when you flip it about a mirror axis.

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