Select exercises for young proficients in the mathematicks. [electronic resource] : Containing I. A great variety of Algebraical Problems with their Solutions. II. A choice Number of Geometrical Problems with their Solutions both Algebraical and Geometrical. III. The Theory of Gunnery, independent of the Conic Sections. IV. A new and very comprehensive Method for finding the Roots of Equations in Numbers. V. A short Account of the Nature and first Principles of Fluxions. By Thomas Simpson, F.R.S. To which is Prefixed, An Account of the Life and Writings of the Author, By Charles Hutton, F. R. S.