If a*b*c=60, where a, b, and c are integers greater than 1, a+b+c=?
60=2^2*3*5.
(1) a + b = 8. If a=3 and b=5, then c=4 and a+b+c=12 but if a=2 and b=6, then c=5 and a+b+c=13. Not sufficient.
(2) Both a and b are odd numbers. Since both of them must be greater than 1, then they must be 3 and 5, thus c=4 and a+b+c=12. Sufficient.
Answer: B.
60=2^2*3*5.
(1) a + b = 8. If a=3 and b=5, then c=4 and a+b+c=12 but if a=2 and b=6, then c=5 and a+b+c=13. Not sufficient.
(2) Both a and b are odd numbers. Since both of them must be greater than 1, then they must be 3 and 5, thus c=4 and a+b+c=12. Sufficient.
Answer: B.
