any number that has 9 as a factor also has 3 as a factor why is this
any number that has 9 factor also has 3 as a factor. why is this
Let's suppose 9 is a factor of the number N. That means N is 9 times some integer M.
N = 9*M
Since 9 = 3*3, we can also write N as
N = 3*3*M
That means N is 3 times some integer (3*M). So 3 is also a factor of N.
Factors are numbers that multiply together to give another number. You can also say that a number can be divided evenly by its factors.
If the factors of a number can also be factored, then the number can be divided by those smaller factors as well. For example, 6 is a factor of 30. 6 is 2 times 3, so that means 2 and 3 are also factors of 30.
You can divide 30 by 2, by 3 and by 6 to find other factors as well.
Hope this helps!
Think of 9 as 3*3. If a number has nine as a factor it clearly has 3 as a factor.