2. 外语
  3. Each of Questions 1 to 7 presents two quantities. Quantity A and Quantity B. Compare the two quantities. You may use additional

Each of Questions 1 to 7 presents two quantities. Quantity A and Quantity B. Compare the two quantities. You may use additional

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问题 Each of Questions 1 to 7 presents two quantities. Quantity A and Quantity B. Compare the two quantities. You may use additional information centered above the quantities if such information is given. Choose one of the following answer choices:
A if Quantity A is greater;
B if Quantity B is greater;
C if the two quantities are equal;
D if you cannot determine the relationship based on the given information.

选项 A、 
B、 
C、 
D、 
答案B
解析 The correct answer is B. You could solve this by multiplying each quantity and comparing. However, you could also solve by thinking about the quantities in the following way:
14(256)
= 14(255 + 1)
= 14(255)+ 14(1)
= 14(255)+ 14
15(255)
=(14 + 1)(255)
=14(255)+ 1(255)
=14(255)+ 255
Thus it is apparent that Quantity B is greater than Quantity A.
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