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Lesson 1: Factors and multiples

# Reasoning about factors and multiples

Use the equation 3x5=15 to understand the relationship between factors and multiples. Created by Sal Khan.

## Want to join the conversation?

• um... whats a factor of 78 plz help im cofuzed🤔
• The factors of 78 are 1,2,3,6,13,26,39,78.
To figure these out be sure to check the previous lesson on divisibility checks.
• how do i do fector pair?
• for real
• awesome
• pls 10 up vots
• Great!
• Why were there things from 3 years ago,2 years ago,and 1 year ago?
• Because that's when the questions were asked. When new students come on Khan Academy in future years, they'll wonder how our comments were 2, 3, 4, 5 years ago.
• what are factors of 82?
• 82 is a composite number and has 4 factors which are 1, 2, 41 and 82!

Happy Learning!