What is the moral of The Devils Arithmetic?

What is 159cm converted into hands? How many rows of 9 make 54? Does China have an illegal immigrant problem? What solid figure has 5 faces 8 edge and 4 corners? Is 10 foot 300cm? Is 5 cm the best estimate of how long a little eraser? What are the number that divide 432? How many days old is someone who is 14 years old? what is 3 divided by 6,082? What is the advantage of two dimension? Three vocations of life? What is the LCM of 28 and 196? How to prove that three points are collinear by section formula? How do you write out 163? When is long division not the fastest way to convert from fraction notation to decimal notation? What is the quotient of three sevenths? What year did the walls of Jericho fall? How is adding and subtracting with money like adding and subtracting with numbers? 38.80 million in standard form? What is the answer to puzzle number 9 in Professor Layton and the Unwound Future?