How many integers between 1 and 1000 (inclusive) are a square number as well as a cube number?

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问题 How many integers between 1 and 1000 (inclusive) are a square number as well as a cube number?

选项 A、1
B、2
C、3
D、4
E、5

答案C

解析 题目求1到1000之间(包括1和1000)既是完全平方数又是完全立方数的个数,即求6次方数的个数。16=1,26=64,36=729,46=4196>1000,因此1到1000之间只有16,26,36符合条件,共3个。故答案为C。
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本试题收录于: GRE QUANTITATIVE题库GRE分类
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