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### Course: Get ready for 6th grade>Unit 4

Lesson 4: Factors and multiples

# Understanding factor pairs

Use multiplication and an understanding of area to identify factor pairs for 6 and 16. Created by Sal Khan.

## Want to join the conversation?

• How can I remember which is a Multiple and which is a Factor?
• a multiple is the answer (20 is a multiple of 5 times 4) 5 times 4 = 20
• can there be three factors in a factor pair?
• Well, they're called pairs...
It's easiest as a pair because if you know a factor of a number, you can just divide the number by the factor to get another factor.

Anyway, you could have a factor triplet if you broke one of the 2 factors in the pair into 2 smaller factors haha
This leads on to the idea of prime factorisation, which is quite interesting!
• Can I ask something is 1 a factor
• 1 is indeed a factor. In fact, it is a factor of every number! Why? Recall what a factor is: it's a number you can multiply by another number to get a certain result. You can multiply 1 by any number to get...well that very same number.
For ex:
1 * 5 = 5
1 * 100=100
1 * 123456789 = 123456789
This tells us that 1 is actually a factor of every number. "Every number" also includes negatives.
• yo can yall help me i dont know what a factor is
• a factor is 2 numbers multipy
• What is the defination of Factor and Factor pairs?
• Hello Dear!
A "Factor" is any number is any number that is multiplied by another number (Also a Factor) to get some resultant number (i.e. a Multiple of the two Factors).
Now, the two numbers that were multiplied collectively form a pair and are named as "Factor Pair".
I hope you would have got an understandable definition of the two.
Best regards.
• So cool At , at and at
• I don`t understand this at all
• Factors are numbers that you multiple to create another number.
For example, factor pairs for 15 are:
1 and 15 because 1x15 = 15
3 and 5 because 3x5 = 15

Another way to look at factors is that they evenly divide into the number. 15 is evenly divisible by 1, 3, 5, and 15.

Hope this helps.
• Do numbers with decimals also have factor pairs？
• Nope. Factorising only applies to whole numbers - numbers that don't have decimals in them.