Compare four sets of pattern blocks. Use pattern blocks to make different shapes. Warm up with a Mystery Math Mistake to tell whether Dotson's 10-frames represent a number less than his focus number.

In the third century BCE, Apollonius of Perga asked how many circles one could draw that would touch three given circles at exactly one point each. It would take 1,800 years to prove the answer: eight ...

Math Riddles: Today, we bring another set of missing shapes puzzles with difficulty level hard. In this missing shapes puzzle, one has to figure out which is the next shape in the sequence. There are ...

The grandest project in mathematics has received a rare gift, in the form of a mammoth 350-page paper posted in February that will change the way researchers around the world investigate some of the ...