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2021 Math Competition

# Preparation Materials

## Preparation Videos

• Learn more about prime factorization—understanding prime number, factors, Least Common Multiple (LCM) and Greatest Common Factor (GCF)—learn how to solve two prime factorization problems!
• Discover two ways to find LCM and GCF.
• Solve two square root problems without a calculator using prime factorization.
• Learn a quick way to use prime factorization to find the number of whole number factors in two problems.
• Learn a quick way to use prime factorization to find the sum of whole number factors in two problems.
• Learn two strategies to find the area of a quadrilateral and the area of a square in a circle.
• More ways to find the area of a quadrilateral that does not have a clear location on the coordinate graph.
• Discover various strategies to solve for the area of an equilateral triangle.
• Learn a different way find the area of a polygon formed by connecting coordinates.
• Teachers: Some insights, tips and strategies for building a MATHCOUNTS competition program at your school.