Notes for Homework 12 and the link to the five British logicians

Notes on fractions to repeating decimals and vice versa

Notes on Roman numerals to Hindu-Arabic numerals and vice versa

Link to the biographies of Dodgson, Boole, Babbage, Lovelace and De Morgan

Notes for Homework 11

Notes for the chi square table: Confidence interval of a standard deviation and goodness of fit of a set of categories