Mathematics on Several Subjects: Theory and tests: Combinatorics, Logarithms, Arithmetic Progressions and Geometric Progressions and others topics.

We approach questions such as Combinatorial Analysis with not repeated elements. We show permutations, arranges and combinations. We end this topic with the Newton's Binomial.
We show Logarithms and several properties.
In Arithmetic Progression and Geometric Progression we show several formulas.
In Set Theory we give solutions for several questions with the resource of the Venn Diagram.
Logical Propositions and truth tables are shown in several situations with interesting properties.
Proportional Numbers also are shown with theory and tests.
Percentages and interest with theory and several tests also are shown. Some of these tests show an interesting and useful application of the Newton's Binomial.
Central Angles and Inscribed Angles also were shown in the end.