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题目内容
If both the sum and the product of the four positive integers a, b, c and d are even, while the product of a, b, c and d is multiple of 8, but not multiple of 16, then what is the number of these integers that could be even?
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· 相关考点
1.4.2 奇偶性运算
以上解析由 考满分老师提供。