单项选择题

Of the positive integers that are multiples of 30 and are less than or equal to 360，what fraction are multiples of 12（）

A.A
B.B
C.C
D.D
E.E

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单项选择题
3×104 is greater than 4×103 by what percent（）

A. 25%
B. 75%
C.
D. 650%
E. 750%
单项选择题
If n is any prime number greater than 2，which of the following CANNOT be a prime number（）

A. n-4
B. n-3
C. n-1
D. n+2
E. n+5
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