The interval-halving technique can be used to efficiently compute results for problems like guessing numbers and finding roots because:
1) in Java, division by two throws away the remainder
2) all numbers involved in the computation are non-negative
3) the answer to the question you can ask to get information about the mid-point of the interval allows you to eliminate (as possible results) all points on one side of the mid-point
4) the function you are evaluating over the interval has no more than two maximum or minimum values in that interval
5) e. none of the above