The prime factors of 85 are: 5 and 17
5 times 17
5 x 17 = 35
85
^
5x17
PRIME'
5x17
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Out of four total factors, 85 has two prime factors: 5 and 17.
Prime factor each number and choose the common factors to multiply.85=5x17155=5x315 is the greatest common factor.
85 goes to 5 and 17.It can't go anywhere from there855,17
37 is a prime number !... Therefore - the GCF is 1
To find the GCF of two numbers, you must first express them as their prime factors. In this case, that would be: 85 = 5x17 70 = 2x5x7 The next step would be to identify any common factors. In this case the only common factor is 5. Thus, the GCF of 85 and 70 is 5.