Rapid Arithmetic Quick and Special Methods in Arithmetical Calculation Together with a Collection of Puzzles and Curiosities of Numbers

12mo 190pp. third printing. from Preface: ".A reference to the table of contents will show that this preface tells only of a small part of what is to be found in the book. In a certain sense this work is a supplement to the ordinary textbook of arithmetic. But it is more than that; it will be found of practical application in real work, for by applying the methods to be found in its pages a greater command of arithmetical operations will be acquired and quick ways of calculating will result. Much that is amusing in the way of oddities and recreations in the science of numbers will be met with in its pages." #02430. Book VG: mild toning/foxing to endpapers, mild shelf wear, text unmarked, binding tight.