Use these four dominoes to make a square that has the same number of dots on each side.
I want some cubes painted with three blue faces and three red faces. How many different cubes can be painted like that?
A walk is made up of diagonal steps from left to right, starting at the origin and ending on the x-axis. How many paths are there for 4 steps, for 6 steps, for 8 steps?
It is impossible to trisect an angle using only ruler and compasses but it can be done using a carpenter's square.
Can you rearrange the cards to make a series of correct mathematical statements?
Relate these algebraic expressions to geometrical diagrams.
This is a beautiful result involving a parabola and parallels.
Can you invert the logic to prove these statements?
Can you work through these direct proofs, using our interactive proof sorters?