Among the topics covered are: Conditional equation, Deficient number (defective number), Double inequality, Fibonacci sequence, Interdependent event, Multiplicative Identity, Property, Ratio Slope, Transitive Property of Equality, Whole number, Zero Exponent Theorem. Biographies include: Maria Gaetana Agnesi (1718-1799), Apollonius of Perga (c. 262-190 BCE), Nina Karlovna Bari (1901-1961), Bhaskara (1114-1185), Dame Mary Cartwright (1900-1988), Leonhard Euler (1707-1783), Helena Rasiowa (1917-1994), Abu Kamil (c. 850-c. 930), Shing-Tung Yau (1949-present).