1 and 7
The factors of 21 are: 1, 3, 7, 21The factors of 35 are: 1, 5, 7, 35
Factors of 21 are 3 and 7 (21=3x7). Factors of 35 are 5 and 7 (35=5x7). Factors of 49 are 7 and 7 (49=7x7).
Factors of 21: 1, 3, 7, and 21.Factors of 35: 1, 5, 7, and 35.You didn't ask for the factors that are common to 21 and 35.If you had asked for those, the answer would have been: 1 and 7 .
735
3 is a factor of 21, so ignore it. 21 factors to [3 7] 35 factors to [5 7] common factor [7] LCM = 21 * 35 / 7 = 105 ■
The factors of 21 are:1, 3, 7, 21The factors of 35 are:1, 5, 7, 35The common factors are:1, 7
1, 3, 5, 7, 15, 21, 35, 105.
The common factors are: 1, 7
The common factors are: 1, 7
The factors of 21 are: 1, 3, 7, 21The factors of 35 are: 1, 5, 7, 35The common factors are: 1, 7
The GCF of 7, 21 and 35 is 7. This leaves you with 1, 3 and 5 respectively, You can go no further as the only common factor remaining is 1.The factors of 7 are: 1, 7The factors of 21 are: 1, 3, 7, 21The factors of 35 are: 1, 5, 7, 35The common factors are: 1, 7The Greatest Common Factor (GCF) is: 7
15: 1,3,5,15 28: 1,2,4,7,14,28 21: 1,3,7,21 35: 1,5,7,35