Question: what is the greatest common factor for 48 and 100?
Answer: The prime factorization of 100 is: 2 x 2 x 5 x 5. The prime factors and multiplicities 48 and 100 have in common are: 2 x 2. 2 x 2 is the gcf of 48 and 100. gcf(48,100) = 4.