8th grade
posted by kendra .
how to find common factors and common multiples for prime factorization.

Please type your subject in the School Subject box. Any other words, including obscure abbreviations, are likely to delay responses from a teacher who knows that subject well.

Factorsa number can be evenly divided without a remainder
Examples: Factors of 16 are 2, 4, 8. Factors of 24 are 2, 3, 4, 6, 8, 12.
Multiplesresult of multiplying by a whole number.
Examples: Multiples of 2 are 2, 4, 6, 8, 10, etc. See how you are just counting by 2's? Multiples of 6 are 6, 12, 18, 24, 30, etc. 
Common are obviously the ones that each number has in common. List both, like I did above, and see which numbers are in both groups. Post specific questions with your answer if you'd like them checked.