1. Peter pointed to a printed notice on the fence as they passed a construction site. "That's a funny number, Dad," he said. "It's the building permit." "Funny?" Stan asked. "You mean because the first three figures are the same as the other three? "Partly, but that's not all," the boy replied. "It's just seven times the square of each half." What was the number?

143143

132132

122122