In the second row, for example, 2 is the sum of 1 and 1 above it (the row numbers begin with zero). You can actually keep going ad infinitum. One of the neat features of Pascal’s Triangle is ...

Pascal's rule tells us that each entry of Pascal's triangle is the sum of the entry to its upper right and its upper left. For example ... people worked through the problem together.

Pascal’s triangle arises naturally through the study of combinatorics. For example, imagine selecting three colors from a five-color pack of markers. The order the colors are selected doesn’t ...