2017年全国美国数学大联盟杯小学中年级四年级竞赛初赛
\textbf{(2017 Math League, Priamry 4, Question \#40)}  A group of kids aged $$5$$ to $$12$$ went to the movies. The product of the ages of these children is $$3080$$. What is the sum of the ages of these children?  一群$$5$$至$$12$$岁的孩子去看电影．这些孩子的年龄的乘积是$$3080$$．请问这些孩子的年龄的和是多少？ 
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$$3080=2^{3}\times5\times7\times11$$,  $$5+7+8+11=31$$． 