Sideways Arithmetic from Wayside School : More than 50 Mindboggling Maths Puzzles! (Wayside School) -- Paperback

Why does elf + elf = fool? How many meals will Miss Mush, the lunch teacher, have to cook for the food to taste as bad as it smells? This title features Sideways Arithmetic problems that may look puzzling at first, but you can use real maths to solve them, and the answers are right there in the book.