For example, imagine you wanted to color each dot below so that there were never two dots of the same color next to each other—this is an example of coloring. Dr. Liu explains, "I work on a type of ...

One of the great episodes in the history of mathematics began on October 23, 1852. In a letter to Sir William Rowan Hamilton, Augustus De Morgan wrote, “A student of mine asked me today to give him a ...

Have you ever tried to do the brainteaser below, where you have to connect the dots to make the outline of a house in one continuous stroke without going back over your lines? Or perhaps you've ...