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Greatest Common Factors  Problem 4
Alissa Fong
Alissa Fong
MA, Stanford University
Teaching in the San Francisco Bay Area
Alissa is currently a teacher in the San Francisco Bay Area and Brightstorm users love her clear, concise explanations of tough concepts
Finding the greatest common factor of two integers means finding the largest number that multiplies into both of the numbers that you were given. One way to do this is to break both numbers into their "prime factorization" using a number tree. From there, circle any factors, or "leaves" that are the same in both trees. The product of those circled numbers will give you the greatest common factor.
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Alissa Fong
M.A. in Secondary Mathematics, Stanford University
B.S., Stanford University
Alissa has a quirky sense of humor and a relatable personality that make it easy for students to pay attention and understand the material. She has all the math tips and tricks students are looking for.
Your tutorials are good and you have a personality as well. I hope you have more advanced college level stuff, because I like the way you teach.”
Thanks alot for such great lectures... I never found learning this easier ever before... keep up the great work.... :)”
You seem so kind, it's awesome. Easier to learn from people who seem to be rooting for ya!' thanks”
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Sample Problems (8)
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Greatest Common Factors
Problem 1 10,746 viewsFind the greatest common factor of
a) 24 and 60b) 18x² and 27x³ 
Greatest Common Factors
Problem 2 8,518 viewsFactor:
a) 5x³ + 10xb) 6p³ − 12p² − 60p 
Greatest Common Factors
Problem 3 6,998 viewsFactor:
3x(x + 6) − 10(x + 6) 
Greatest Common Factors
Problem 4 1,031 views 
Greatest Common Factors
Problem 5 982 views 
Greatest Common Factors
Problem 6 963 views 
Greatest Common Factors
Problem 7 900 views 
Greatest Common Factors
Problem 8 549 views
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