Open Middle®
Directions: Using the digits 1 to 9 at most one time each, to make one set of functions intersect exactly twice, one set of functions intersect exactly once, and one set of functions never intersect. Source: Mike Fouchet
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Open Middle® problems are licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
Open Middle® problems are licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.