No. 2 is not a factor of 105.
For 60, 2, 3 and 5 For 105, 3, 5 and 7
60 = 2 * 2 * 3 * 5 105 = 3 * 5 * 7 Common Prime Factors: 3, 5
The prime factors of 60 are 2, 2, 3, and 5.The prime factors of 105 are 3, 5, and 7.The prime numbers that are factors of both 60 and 105 are 3 and 5.
The common factors of 60 and 105 are: 1, 3, 5, and 15
The common factors of 60, 105, and 165 are: 1, 3, 5, and 15
60: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60105: 1, 3, 5, 7, 15, 21, 35, 105
Factors of 60: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60Factors of 105: 1, 3, 5, 7, 15, 21, 35, 105GCF (60, 105) = 15
The prime factors of 105 are 3, 5, and 7.The prime factors of 126 are 2, 3, 3, and 7.Therefore the prime factors that 105 and 126 have in common are 3, and 7.
The factors of 105 are: 1, 3, 5, 7, 15, 21, 35, and 105.The prime factors of 105 are: 3, 5, and 7.The factors of 90 are: 1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, and 90.The prime factors of 90 are: 2, 3, and 5.
1, 2, 3, 5, 6, 10, 15, 30 1, 3, 5, 9, 15, 45 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60 1, 3, 5, 7, 15, 21, 35, 105
30: 1, 2, 3, 5, 6, 10, 15, 30 45: 1, 3, 5, 9, 15, 45 60: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60 105: 1, 3, 5, 7, 15, 21, 35 Therefore, the greatest common factor(GCF) of them is 15. gcf(304560 105) = 15 Found by prime factorisation: 304560 = 2^4 x 3^4 x 5 x 47 105 = 3 x 5 x 7 hcf = 3 x 5 = 15 However, I suspect that you asked for the gcf of 30,45,60 and 105 and the commas were stripped (as they cause problems with accessing questions across the internet - putting a space after the comma would have left the numbers readable), in which case: gcf(30, 45, 60, 105) = 15 Found by prime factorization: 30 = 2 x 3 x 5 45 = 3^2 x 5 60 = 2^2 x 3 x 5 105 = 3 x 5 x 7 hcf = 3 x 5 = 15 [Curiously the hcf is the same in both cases.)
Factors of 105 are: 1, 3, 5, 7, 15, 21, 35, and 105.Factors of 106 are: 1, 2, 53, and 106.