**KGSEA VIDEO LECTURES**

**KGSEA VIDEO LECTURES**

**Knowledge Base for All AMC Levels**

“What you need to know before you try any problems”

**Number Theory**

Divide By 25

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Arithmetic Series

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LCM

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Grouping1

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Defined Operator

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Power Of 2 Fractions

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Parallel Resistors

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Power Of 2

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Divisibility By 6

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**Geometry**

Pythagorean1 Triples

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Area Of Circle Sectors

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Mean Median Mode

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Symmetry Reflection

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Equal Areas Triangle

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Equal Areas Rectangle

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Work Intro

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Work Painting

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Work PoolFilling

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Picks Theorem

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45 45 90 Triangle

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Line Of Symmetry

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City Block Distance

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Medians Of Triangle

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Inscribed Semi Circle

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Triangle Area Ratio

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**Counting and Probability**

Probability 1

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Permutation

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Combination 1

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Hand Shake Problem

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Arithmetic Sequence

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Modulus Function

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Telescoping Series

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1st D to 2nd D

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Average Of Averages

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Solution Problems

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Complement 1

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Complement 2

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Complement 3

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Complement 3A

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Complement 4

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Trinomial Expansion 1

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Trinomial Expansion 2

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Trinomial Expansion 3

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Trinomial Expansion 4

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Trinomial Expansion 5

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**AMC 8/10/12 Problems & Solutions**

AMC 8 (1987_1988_1989)

AMC 8 (1990_1991_2002)

AMC 8 (2003_2004_2005)

AMC 8 (2006_2007_2008)

AMC 8 (2009)

AMC 10 (2006A, 2006B, 2007A)

AMC 10 (2007B, 2008A)

AMC 12 (2006A, 2006B, 2007A)

AMC 12 (2007B, 2008A)

**Other Resources**

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서울 영등포구 영등포구 여의도동 45-11 주택건설회관 674 우>150-736**INFO@KGSEA.ORG**

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