Puzzle of the Week
By Vincent on November 7, 2011
Pretend that the above is drawn on a piece of paper, draw 4 lines with an imaginary pen w/o lifting the pen so that the lines go through all the [...]
By Noah Graff on November 2, 2011
Move six matches in such a way that you get a house instead of these wine glasses.
By Vincent on October 3, 2011
An airplane flying at several thousand feet casts a shadow on the ground. Will the shadow be larger, smaller or the same size as the airplane? Why?
By Vincent on September 6, 2011
Each of the five interlocking gears possess letters at its contact point. (The numbers next to the gear specifies how many teeth the gear has.) After a certain number of [...]
By Vincent on August 23, 2011
In this figure, which area is larger, Area 1 or Area 5? How much is the difference?
By Emily Halgrimson on July 6, 2011
What goes around the world but stays in a corner?
By Lloyd Graff on June 7, 2011
A Hamiltonian Circuit is a continuous path that passes once through each point of a graph. Can you find the Hamiltonian Circuit for the 11-point graph illustrated here?
By Emily Halgrimson on May 9, 2011
By Vincent on September 21, 2010
Slice the picture into 2 sections from which you could make an 8×8 square.
By Vincent on August 9, 2010
This picture shows two large triangles, each made up of a number of pieces, each a rearrangement of the other. But one has a square missing. How can this be?