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質數除了2以外都是奇數,而題目是一個質數的3倍與另一個質數的2倍之和為100,是偶數,所以第一個質數必然是偶數,即2 所以第一個數的3倍就是2×3=6 所以第二個數是:(100-6)÷2=47 所以這兩個質數分別是2和47
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