Squares Built of Right Triangles

Squares Built of Right Triangles

Squares Built of Right Triangles (MathPickle, 2012) Give your students practice working with the addition of square roots and Pythagoras. Download puzzle-sheets here. There is no science in this world like physics. Nothing comes close to the precision with which...
Algebra on Rectangles

Algebra on Rectangles

This is a single variable algebra puzzle in which students try to find squares of different sizes to tile a rectangle. I prefer the two variable algebra variant on the right. Get students to create their own history puzzles. Algebra on Rectangles (R. L. Brooks, C. A....
Wrongifying Operators

Wrongifying Operators

Wrongifying Operators (MathPickle, 2012) Epic failure of arithmetic – when our operators (addition, subtraction, multiplication and division) fail to give us the answer! It is fun for students to see when things don’t work. It also forces them to be...
Fractions = Decimals using Algebra

Fractions = Decimals using Algebra

Desimal Deja-vu (MathPickle, 2013) Fractions and decimals are connected in magical ways. Here we convert from fractions to decimals and from decimals to fractions. This requires algebra. There’s a good case to be made that having fun is a key evolutionary...
Prime Number Catacombs

Prime Number Catacombs

Prime Number Catacombs (William Paulsen, 2000) This is absolutely one of my favourite pedagogic discoveries from recreational mathematics. It is engaging, evocative and curiosity inducing. I now prefer to start students groups off at different numbers. They must try...