单项选择题
How many positive whole numbers less than 81 are NOT equal squares of whole numbers()
A. 9
B. 70
C. 71
D. 72
E. 73
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单项选择题
()
A. 1
B. 2
C. 4
D. 8
E. 16
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单项选择题
If p is a prime number greater than 11,and P is the sum of the two prime numbers x and y,then x could be which of the following()
A. 2
B. 5
C. 7
D. 9
E. 13
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