


Coin Cup  Can you turn the cup upside down by moving only two coins?
 August 11, 2014 

The Three Squares  Take twelve matches and arrange them into the grid shown above. Can you move exactly 3 matches and get 3 perfect squares?
 August 11, 2014 

Octagon Castle  Use all the seven pieces to build up the octagon castle. You can rotate pieces and flip them over, but you can not overlap them.
 August 11, 2014 

Fold The Sheet  The object of this puzzle is to fold the rectangle along the lines in such a way that the squares are in serial order from 1 to 8, with number 1 faceup on top. You aren't allowed to tear the rectangle, just fold and possibly slightly bend it.
 August 11, 2014 

The Two Queen Question  Try to place two chess queens on an 8x8 chessboard, first so that they both attack the maximum possible number of vacant cells of the board and second so that they both attack the minimum possible number of vacant cells.
 August 11, 2014 

Sam Loyd Puzzles  There are 25 fantastic puzzles by Sam Loyd on this site  see them all here!
 August 11, 2014 

Two Flowers  Can you put the petals, stems and leaves together to make a circle? You are allowed to rotate the parts but not overlap them.
 August 11, 2014 

The Testa  Can you move the pieces into the grid so that there is exactly one color in every row and column?
 August 11, 2014 

Triangle Folds  Try to fold these rectangles into an equilateral triangle colored fully in red on one side and fully in yellow on the other.
 August 11, 2014 

The Eighth Triangle  There are 7 equilateral triangles...can you move exactly three matchsticks to make a total of 8 equilateral triangles?
 August 11, 2014 

Creating A Cuboid  Which of the following patterns (A through D) can be folded to create a full, 1x1x2 cuboid shown in the middle? Parts of the pattern must not overlap each other. 
August 11, 2014 

