N schools send student representative to participate in the gatherings, the student who each school participates are least is 1 person most is 28 people. Various school total numbers of students that known participates in the activity are 1825 people, presently plans to group to engage in the event them, requesting each group of students to be least is 1 person most is 170 people, and student in same school must be in the same group, then at least wants ..... the group surely to meet the above request.
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