1 set de 18 baloane
1 set de 12 fluiere
1 set de 8 coifuri
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18 = 2 × 3²
12 = 2² × 3
8 = 2³
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c.m.m.m. c. al numerelor ( 18; 12; 8) = 2³ × 3² = 8 × 9 = 72
72 : 18 = 4 seturi de baloane
72 : 12 = 6 seturi cu fluiere
72 : 8 = 9 seturi cu coifuri