The rule is minus 5.
So 20, 15, 10, 5, 0, -5
468 seats is the answer.
26 x 18
or
13 x 2 x 9 x 2
both equal 468
Total = 7 slices.
1student = 7/9 of a slice.
Total number of students:


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Answer: She will be able to hand out to 9 students.---------------------------------------------------------------------------