Question 1197216
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The total number of students is 24+27+21 = 72.<br>
The requirement of "between 5 and 9 students" on each team is not clear; I will assume teams of 5 or 9 are allowed.<br>
5 and 7 are not factors of 72; but 6, 8, and 9 are.  So there can be
(1) 6 students on each team (12 teams); or
(2) 8 students on each team (9 teams); or
(3) 9 students on each team (8 teams)<br>
ANSWERS: 6, 8, or 9 students on each team<br>
Of course if 9 students on a team is not allowed, then the number of students on each team can only be 6 or 8....<br>