Question

Emma says the GCF of 16 and 12 is 48. Her friend Grace says the answer is 4. Who is right? Explain.

Answer 1

Grace is correct because emma is found the LCM (least common multiple) 

Answer 2

Grace is correct.  The greatest common FACTOR of 16 and 12 is 4.

Emma gave the correct answer to a different question. 48 is the least
common MULTIPLE of 16 and 12, not their greatest common factor.