#### Learn by Subject

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This course presents many interesting methods to solve math problems. There is no prerequisite to take this course though minimal $8$ grade is suggested in most cases.
To buy this complete series (20 - Combinatorics (Counting)) for a discounted price of $99, click here. Counting problems appear in competitions at all levels. This course aims to help student to get familiar with various counting techniques and patterns. So they can become confident and proficient when attempting such problems from AMC8 to AIME. To buy this complete series (25 - Advanced Combinatorics) for a discounted price of$99, click here.
This is an intermediate to advanced course for students who are at AIME and above level.
To buy this complete series (48 - Indeterminate Equation) for a discounted price of \$99, click here.
Indeterminate equation is an important subject in number theory. Problems related to this topic can appear by itself or be part of other subjects. Simple indeterminate equations may appear in AMC8 level, but some challenging one can be tested in USAMO or even IMO level. Therefore, understanding how to solve indeterminate equations is a necessary skill for anyone who wants to perform well in math competitions.