Pascal’s triangle, for me, is an example of a problem or structure that I have returned to many times since I first encountered it in middle school. There are many other patterns inside Pascal’s ...

It is Pascal's Triangle, the pyramid of numbers in which the series in the next line is given by adding together adjacent pairs in the line above to generate 1, 1 1, 1 2 1, 1 3 3 1, 1 4 6 4 1, and ...

Watch as Vi creates patterns, using Pascal's Triangle to explore relationships in number. See what happens when she circles the odd numbers. What rule does she use to create the final pattern?