ma123 wrote:

Why is the answer not C?

1) If n = 30, then 75 -30 = 45 > 30-50 = -20 and n is closer to 50. If n = 60 then 75 -60 = 15 > 60 -50 = 10 but n is closer to 75.

2) n > 60 not suff since do not know how much larger

Together: 75 - 62 = 13 > 62 - 50 = 12 ---> 60 < n < 63 Sufficient

Hello

In both the examples that you have taken, (n=30 and n=60), n is actually closer to 50 only, than it is to 75.

(60 is closer to 50 because difference between 60 and 50 is 10 while difference between 60 and 75 is 15).