What does the title of The Devil's Arithmetic mean?

Who has discovered the midpoint theorem? How do you find the outlier in a box and whiskers plot? How many squares of grass come on one pallet? How many eggs for 80 people? How do you write 0.0356 in word form? What is 39 over 5 as a mixed number? How do you find the volume of a cube in cm? What is AWG18 in inches? 2.3 cm equalls m? What is the LCM of 16 28 40 and 77? What is 25 to the first power? How many times greater is the digit in the ten thousands place than the digit in the hundreds place? What is two thirds of 2 years 9 months? What is five sixteenths equal to? In the diagram structures 1 2 and 3 make up a? Is 0.0261 smaller than 0.005? What is 483 in Roman Numerals? 3 to 10 as a percent? What letter by convention is used for a variable when another name isn't obvious? Why is 19 rounded to the nearest 10?