SOLUTION: Not including the number one (1) which is always a common but not prime
factor, 54 and 81 have how many common factors?
A) 1 B) 2 C) 3 D) 4 E) 5
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Divisibility and Prime Numbers
-> SOLUTION: Not including the number one (1) which is always a common but not prime
factor, 54 and 81 have how many common factors?
A) 1 B) 2 C) 3 D) 4 E) 5
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Question 252667: Not including the number one (1) which is always a common but not prime
factor, 54 and 81 have how many common factors?
A) 1 B) 2 C) 3 D) 4 E) 5
You can put this solution on YOUR website! 81 has 3*3*3*3
54 has 3*3*3*2
so they have the prime number 3 in common
but they also have 3,9,27 in common
so they have three common factors not including one
