2 x 3 x 5 to the second power
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15. 150 = 10 x 15, 165 = 11 x 15 and 10 and 11 are co-prime
(120,1)(60,2)(40,3)(30,4)(24,5)(20,6)(15,8)(12,10)
They are: 2, 3 and 5
Since 75 is a factor of itself and of both 150 and 225, it will automatically be the GCF of this set. One correct way to do it is through prime factorization. 3 x 5 x 5 = 75 2 x 3 x 5 x 5 = 150 3 x 3 x 5 x 5 = 225 Select the common factors. 3 x 5 x 5 = 75, the GCF.
As a product of its prime factors: 2*2*2*7*127 = 7112