first three common factors of 3,4,5
The common factors are: 1, 2, 3, 4, 6, 12
9 and 21 only have two common factors: 1 and 3.
Sorry, only two common factors! The common factors are: 1, 3
The common factors of 12 and 15 are 1 and 3.
Nine has three factors.
Common factors of 99 and 33 are: 1, 3, 11, and 33.
First, find the factors: 90 = 2*3*3*5 81 = 3*3*3*3 Common factors are 3*3 = 9.
If that's 12, 18 and 24, 1, 2, 3 and 6 are common factors of all three.
Since 9 is a factor of 27, all of its factors are common.
Three only has two factors, one and itself.
Nine has three factors: 1, 3 and 9
11 is prime, so there are no common factors with it other than 1.