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Rounding Machine
Problem
A particular number machine works as follows.
E.g. 3.4 
6.8 6 or 7.9 15.8 15
A different number machine does the following.
E.g. 3.4 3 6 or 7.9 7 14
Notice that 3.4 came out as 6 from both machines, whereas 7.9 came out differently. What must be special about a number for the same value to come out of each machine?
Problem ID: 97 (Jan 2003) Difficulty: 2 Star
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