What are factors and multiples of 12?

Answer 1

if you find the prime factors it makes the number easier to multiple. first make prime factor trees for each of the numbers. i did 18x15.

18 could have 3, 3 and 2 and 15 could have 3 and 5. then the sum could be: 5x2=10x3=30x3=90x3=270

hope this helps. if you are not sure, look up prime factor trees first.

Answer 2

there is no whole number who's a multiple of 15 and a factor of 12. the factors of 12 are 3,4,6,2, The smallest multiple of 15 is 15, so it's not possible.

Answer 3

The factors of 12 are 1, 2, 3, 4, 6, and 12.

The factors of 15 are 1, 3, 5, and 15.

The common factors of 12 and 15 are the numbers that are factors of both, which are 1 and 3.

Answer 4

Factors: 1,2,3,4,6,12

Multiples: 12, 24, 36 and so on.

Answer 5

The prime factors are:

12 = 2 * 2 *3

15 = 3 * 5

Answer 6

30

Answer 7

12