Yes. If you add 1, 2, and 9 together, it equals 12 and 12 is dividable by 3.
3
The GCF is 3.
129 3,43
129 3,43
129 3,43
When looking for factors, try out some small numbers, such as 2, 3, 5, 7. In this case, it is quite obvious that 129 is not divisible by 2. But if you continue trying, you see that it IS divisible by 3. Of course, if you divide 129 by 3, you get the other factor.
1, 2, 3, 5, 6, 10, 15, 30, 43, 86, 129, 215, 258, 430, 645, 1290.
The least common factor of any set of integers is 1.
(129,1)(43,3)
Yes. 1 + 2 + 9 = 12 12 is divisible by 3. If the sum of the digits of a number are divisible by 3, then the whole number is divisible by 3. 129 is a composite number because it divisible by a factor other than 1 and itself.
43
3 or 129.1, 3, 43, 129