3 and all of its multiples.
1 and 3
1, 2, 3 & 6
3 and 5 are both prime numbers and 1 is their only common factor.
Common factors of both numbers are: 1, 2, 3 and 6
common factors of both numbers are: 1 and 3
The common factors are: 1, 5
The factors of 10 are: 1, 2, 5, 10The factors of 15 are:1, 3, 5, 15The common factors are: 1, 5
The factors of 7 are 1 and 7. The factors of 21 are 1, 3, 7, and 21. The only numbers that are factors of BOTH 7 and 21 are 1 and 7.
Factors of 15: 1, 3, 5, and 15.Factors of 6: 1, 2, 3, and 6.Common factors (numbers on both lists): 1 and 3.Greatest common factor: 3 .
The factors of 15 are 1, 3, 5, and 15 .The factors of 75 are 1, 3, 5, 15, 25, and 75 .The common factors ... numbers that are factorsof both 15 and 75 ... are 1, 3, 5, and 15 .
The factors of 66 are 1, 2, 3, 6, 11, 22, 33, and 66 .The factors of 99 are 1, 3, 9, 11, 33, and 99 .The common factors of 66 and 99 ... numbers that are factors of both of them ... are 1, 3, and 11 .
The factors of these numbers are: 1 1, 2 1, 3 1, 2, 3, 6 1, 3, 9