1 Strange. 2  The people in the Red table are looking to buy this item for the price listed. 3  The people in the Blue table have the item and are willing to sell it for the price listed. 4  The top of the table is the best price (highest bid / lowest ask).
The prime factors of 76 are 2, 2, and 19. There are no prime factors in common, so the numbers are relatively prime, which means the greatest common factor is 1.     Factors of 45: 1 3 5 9 15 45   Factors of 76: 1 2 4 19 38 76   The GCF of 45 and 76 is 1       1   The Greatest Common Factor is 1.
Greatest common factor (GCF) The greatest common factor between 2 numbers is the largest factor that they have in common. One good way to find this number is to write down all the factors of both numbers and then find the biggest one that appears in both lists. For example, find the GCF of 12 and 8: