The GCF is 35.
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Factors of 630 are 1 , 2 , 3 , 5 , 6 , 7 , 9 , 10 , 14 , 15 , 18 , 21 , 30 , 35 , 42 , 45 , 63 , 70 , 90 , 105 , 126 , 210 , 315 , 630.Factors of 245 are 1 , 5 , 7 , 35 , 49 , 245.The Greatest Common Factor is 35
The highest common factor (HCF) of 245 and 210 is 35. To find the HCF, you need to identify the common factors of both numbers and then determine the highest one they share. In this case, the factors of 245 are 1, 5, 7, 35, 49, 245, and the factors of 210 are 1, 2, 3, 5, 6, 7, 10, 14, 15, 21, 30, 35, 42, 70, 105, 210. The highest common factor of 245 and 210 is 35 because it is the largest number that divides both 245 and 210 without leaving a remainder.
315 = 32 x 5 x 7525 = 3 x 5 x 73 x 5 x 7 = 105 (GCF)
210 and 420 have a GCF of 210.
The GCF is 42.