Algebraic Thinking

• Building With Bricks

  

  An architect is building a series of pyramids to use in landscaping a fancy garden. read more  

• Can 2 = 1?

  

  Here’s our "proof..." read more  

• Getting There and Back

  

  Can you determine the difference in air speeds when flying into and out of the wind? Try this puzzle and see. read more  

• Let's Shake on That!

  

  Ramanujan is having a party. Since his father and mother named him after a famous Indian mathematician of the 20th century, Srinivasa Ramanujan, he always likes to have mathematical puzzles at his parties. read more  

• More Magic Squares

  

  The ancient mathematical puzzles called magic squares have many variations. read more  

• Magic Stars

  

  We have explored magic squares, puzzles in which we tried to arrange all the numbers from 1 to 9 in the boxes of a 3 x 3  square so that all rows, columns and diagonals add up to the same number. Now we look at magic stars. read more  

• On a Collision Course

  

  In this puzzle we challenge you to figure out how close the two missiles below would be right before collision.  read more  

• Painting Cubes

  

  Puzzles ‘R’ Us is a small company that makes three-dimensional puzzles and sells them over the Internet. read more  

• Seats at the Table or "No Function Too Large"

  

  A catering company specializes in dinners for large groups. They advertise: that “We can seat your entire party at one table; no function is too large for us." read more  

• Telling Time

  

  A clock is a complicated measuring device. There are two scales superimposed on each other, one for hours and one for minutes. read more

• Telling Time With Fuses

  

  You have some fuses, each of which burns for exactly one hour, but unevenly; that is half a length of fuse does not necessarily burn for half an hour. read more 

• The Speed of the Spiders

   

  

  How fast can our spider climb the wall? Find out in these math puzzles. read more  

• The Tortoise and the Hare . . . Revisited

   

  

  There’s an old story about a race between a tortoise and a hare. The hare knew he was much faster than the tortoise. read more