by MathPickle | Sep 19, 2015 |
Parallel Lines and Slopes (MathPickle, 2010) Introduce parallel lines through this beautiful puzzle. Is it even possible? If a solution does exist it is certainly difficult to find, but no promises that a solution actually exists. The other puzzles are good to get...
by MathPickle | Sep 19, 2015 |
64 = 65 Mathemagical Proof (Martin Gardner) Get your older students to break apart a convincing mathemagical trick by linking it to the Fibonacci sequence and calculating the slopes of some line segments. Younger students derive a lot of pleasure by figuring out that...
by MathPickle | Sep 19, 2015 |
Taxi Cab Squares (inspired by the Inscribed square problem of Otto Toeplitz, 1911) Give your students practice with Cartesian coordinates as they explore a new variant of a famous, unsolved problem of Otto Toeplitz (1911). This problem has a very wide spectrum of...
by MathPickle | Sep 15, 2015 |
Complete the Quadrilateral (Don Steward, 2013) Try finding the largest and smallest rhombus, rectangle, trapezoids etc. so their vertices include a special point and the other vertices lie on the lattice points of a grid. The first half of the video is quite easy,...
by MathPickle | Sep 14, 2015 |
Start by drawing a point on a cartesian grid. The position of the point has been selected carefully. The student at the back right of the class begins. They know nothing. They may either take a guess at what will happen next – or may ask for the next slide....
