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外语
The square root of 800 is between which of the following integers?
The square root of 800 is between which of the following integers?
admin
2011-02-20
78
问题
The square root of 800 is between which of the following integers?
选项
A、21 and 25
B、24 and 28
C、27 and 31
D、30 and 34
E、33 and 37
答案
C
解析
The best solution here is to plug in the numbers from the answers until you find the range that works. 21×21=441, 24×24=576, 25×25=625, 27×27=729, 28×28=784, 30×30=900... and we do not need to determine the square of 31 to know that the square root of 800 is between 27 and 31.
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