janbol wrote:
I actually encountered this problem while I was doing exam prep #5.
The first option says that range is 0 and that means Max - Min = 0, not all four of them have difference of zero, no?
iow, if we assume that a<b<c<d
and d-a = 0, how about b and c?
cuz of that I have selected E. The first option does not explicitly say that difference between every number is zero, but only max-min
janbol, if the highlighted portion is true. D-a cannot be 0 as D would be greater than a.
If max-min = 0, then all the numbers would be equal. Think about it, all the values would fall between max and min, if the max and min are same, that does not leave any space for the remaining values. They'd have to be equal to max and min.
If this doesn't help, try thinking of an actual number set (not variables) in which the range is 0, but the numbers are different.