C hapter 7- The chapter begins with Roberts mother talking to herself with Robert in the room. His mother sends him outside but he returns for dinner and goes to bed. The number devil takes Robert to a little white house shaped like a cube with no furniture. All it had in it was plastic looking electronic cubes. The number devil and Robert build a large triangle. After it is built they number the triangles with how many cubes on top of each one. The number devil clapped his hands after they were done, and one row would light up. Robert would have to add up the numbers on the cubes of each row. The next time the number devil clapped the triangle numbers lit up. Then the numbers divisible by five, and them Bonacci numbers. The chapter ends with the lights going out, and the number devil growing very thin. Chapter 8- The chapter begins with Robert in his class room with his friends. the number devil walks in instead of his normal teacher. In this chapter the num...